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Generalization of the Jack polynomial
In mathematics, the Jack function is a generalization of the Jack polynomial, introduced by Henry Jack. The Jack polynomial is a homogeneous, symmetric
Jack_function
Mechanical, hydraulic, or pneumatic, lifting device
screw thread. A hydraulic jack uses hydraulic power. The most common function of a jack is as a car jack, floor jack or garage jack, which lift vehicles so
Jack_(device)
American television series (2018–2023)
Tom Clancy's Jack Ryan (also known simply as Jack Ryan) is an American political action thriller television series based on characters from the fictional
Jack_Ryan_(TV_series)
{\displaystyle C_{\kappa }^{(\alpha )}(X)} is the "C" normalization of the Jack function. If X {\displaystyle X} and Y {\displaystyle Y} are two m × m {\displaystyle
Hypergeometric function of a matrix argument
Hypergeometric_function_of_a_matrix_argument
polynomial Heckman–Opdam polynomials Hermite polynomials Hurwitz polynomial Jack function Jacobi polynomials Koornwinder polynomials Kostka polynomial Kravchuk
List_of_polynomial_topics
Scottish mathematician
Henry Jack FRSE (6 July 1917 – 5 January 1978) was a Scottish mathematician at University College Dundee. The Jack polynomials are named after him. His
Henry_Jack
Cryptographic hash function
BLAKE is a cryptographic hash function based on Daniel J. Bernstein's ChaCha stream cipher, but a permuted copy of the input block, XORed with round constants
BLAKE_(hash_function)
α = 2 {\displaystyle \alpha =2} case of the C normalization of the Jack function. James, Alan Treleven (1961). "Zonal Polynomials of the Real Positive
Zonal_polynomial
Placeholder variables in programming
documentation. They have been used to name entities such as variables, functions, and commands whose exact identity is unimportant and serve only to demonstrate
Foobar
Device for removing boots
remove the boots, or directly handle them if they are dirty. The function of the boot jack can be approximated with a variety of other objects that may be
Boot_jack
American businessman and technologist
brain function and the application of neural network technologies to the analysis and modelling of fMRI imaging data and brain function. In 1995, Jack Hidary
Jack_Hidary
Individual living life form
would have functioned by means of the folded configurations of the RNA replicators resulting from their nucleotide sequences. The philosopher Jack A. Wilson
Organism
Measure of acidity for very strong acids
http://pubs.acs.org/doi/abs/10.1021/ja01571a016 Liang, Jack Joan-Nan, "The Hammett Acidity Function for Hydrofluoric Acid and some related Superacid Systems"
Hammett_acidity_function
hypergeometric series Adolf Hurwitz: Hurwitz zeta-function Hypergeometric function 2F1 Henry Jack (1917–1978) Dundee: Jack polynomial F. H. Jackson: Jackson derivative
List of eponyms of special functions
List_of_eponyms_of_special_functions
2005 South African comedy film
bid to get rid of Jack, the producer spikes his drink with a fictitious drug, Mama Africa, at a glamorous function, and before long Jack has unwittingly
Mama_Jack
Adelung (1798), Scherwenzel was a variant of Grobhäusern in which the Jacks function as wildcards, called Wenzels or Scherwen(t)zels. This is borne out by
Scherwenzel
American author, journalist and social activist (1876–1916)
London (né Chaney; January 12, 1876 – November 22, 1916), better known as Jack London, was an American novelist, journalist and activist. A pioneer of commercial
Jack_London
Type of knot
The hangman's knot or hangman's noose (also known as a collar during the Elizabethan era) is a knot most often associated with its use in hanging a person
Hangman's_knot
Connectors for wiring of telephone equipment
the device, i.e. the assignment or function of each contact. Modular connectors are specified for the registered jack (RJ) series of connectors, as well
Telephone_jack_and_plug
following is a list of TV episodes and OVAs for the Japanese anime Black Jack produced by Tezuka Productions. The OVAs were directed by Osamu Dezaki, while
List_of_Black_Jack_episodes
Fictional character created by author Tom Clancy
John Patrick "Jack" Ryan is a character created by American author Tom Clancy in 1984. He is the main character of the Ryanverse series of novels, films
Jack_Ryan_(character)
Musical artist
Arbor and Detroit. They have released several albums on Norton Records. Jack White, later the leader of the group The White Stripes, played bass on the
The_Hentchmen
Fictional character in the King Kong franchise
Jack Driscoll (credited as John Driscoll in the 1933 film) is a fictional character in the King Kong franchise. In the original 1933 film he was the first
Jack_Driscoll_(character)
American talent manager and patriarch of the Jackson family (1928–2018)
(1893–1993). His father was a teacher. Jackson's great-grandfather, July "Jack" Gale, was a U.S. Army scout. A biography of Jackson also claimed that his
Joe_Jackson_(talent_manager)
Mental process dealing with knowledge
with the world. Cognitive processes are typically categorized by their function. Perception organizes and interprets sensory information, such as light
Cognition
Multiset analogue of matroids
polymatroid is a polytope associated with a submodular function. The notion was introduced by Jack Edmonds in 1970. It is also a generalization of the notion
Polymatroid
Family of connectors typically used for analog signals
and return functions via single 1⁄4 in TRS connectors halves the space needed for insert jack fields which would otherwise require two jacks, one for send
Phone_connector_(audio)
American singer (1958–2009)
Indigenous herbal medicine, a practice passed down from his father, July "Jack" Gale, an US Army scout who had married a Black slave named Gina before the
Michael_Jackson
List of characters appearing in the Marvel Cinematic Universe
spiritual leader of the Eternals, who possesses healing abilities and functions as the "bridge" between the Eternals and the Celestial Arishem. Based
Characters of the Marvel Cinematic Universe: A–L
Characters_of_the_Marvel_Cinematic_Universe:_A–L
Proprietary array programming language
transposed via the function "flip", the column dictionary becomes a table name age -------- john 50 jack 60 q)(flip (enlist `name)!enlist `john`jack)!flip (enlist
Q (programming language from Kx Systems)
Q_(programming_language_from_Kx_Systems)
Combinatorial object in representation theory
is (3, 2, 2, 2, 1). In many applications, for example when defining Jack functions, it is convenient to define the arm length aλ(s) of a box s as the number
Young_tableau
(PPD-40), to ensure that agencies can continue the performance of essential functions under a broad range of circumstances. PPD-40 specifies particular requirements
United States federal government continuity of operations
United_States_federal_government_continuity_of_operations
Hash function that is suitable for use in cryptography
given only its digest. In particular, a hash function should behave as much as possible like a random function (often called a random oracle in proofs of
Cryptographic_hash_function
Journalist and broadcaster
to question and rebut metropolitan assumptions about its character and function. Hargreaves is remembered for appearing on How, a children's programme
Jack_Hargreaves
American biologist
Jack William Szostak FRS (born November 9, 1952) is a Canadian American biologist of Polish British descent, Nobel Prize laureate, university professor
Jack_W._Szostak
Intelligence of machines
particular action will change the state in a particular way and a reward function that supplies the utility of each state and the cost of each action. A
Artificial_intelligence
West Germanic language
upon for many functions, including the expression of tense, aspect, and mood. Auxiliary verbs form main clauses, and the main verbs function as heads of
English_language
Japanese manga series
doctor Black Jack. Black Jack consists of hundreds of short, self-contained stories that are typically about 20 pages long. Black Jack has also been
Black_Jack_(manga)
Military boot
hobnailed jackboot. The hobnailed jackboot has a different design and function from the former type. It is a combat boot designed for marching. It rises
Jackboot
Study of mental functions and behaviors
mental functions in individual and social behavior. Others explore the physiological and neurobiological processes that underlie cognitive functions and
Psychology
American actor (1972–2026)
feature film appearance was in The Basket. He also appeared in Zoe, Duncan, Jack & Jane, Sol Goode, Feast, X-Men: The Last Stand, and starred in Open Water
Eric_Dane
Word used in English language for several purposes
speaker. The word also intensifies elements of a sentence, similar in function to the word so, such as when one says "I was that ill ... I couldn't even
That
2011 Musical
Blue Eyes is a 2011 stage musical comedy based on the 1984 film A Private Function, and features music by George Stiles, with lyrics by Anthony Drewe. The
Betty_Blue_Eyes
1993 US law enforcement siege in Texas
planning for the possibility that a fire would erupt—was a discretionary function for which the government could not be sued. The court also found that the
Waco_siege
Tables comparing general and technical information for common hashes
hash function security/cryptanalysis can be found at hash function security summary. Basic general information about the cryptographic hash functions: year
Comparison of cryptographic hash functions
Comparison_of_cryptographic_hash_functions
British mathematician
Jack A. Thorne FRS (born 13 June 1987) is a British mathematician working in number theory and arithmetic aspects of the Langlands program. He specialises
Jack_Thorne_(mathematician)
group of low-powered, and in some cases, mentally challenged, teens who function as a support group for disabled individuals living in a group home. In
List_of_The_Boys_characters
Sexual paraphilia involving feces
distress or impairment in social, occupational, or other important areas of functioning". Furthermore, the DSM-IV-TR notes, "Fantasies, behaviors, or objects
Coprophilia
3rd episode of the 2nd season of Schoolhouse Rock!
up to? What's your function? What are you seeking?" – Bob Dorough, Conjunction Junction songwriter Conjunction Junction was Jack Sheldon's Schoolhouse
Conjunction_Junction
American fantasy drama TV series (2011–2019)
and the richest man in Westeros. Among Cersei's children are sons Joffrey (Jack Gleeson) and Tommen (Dean-Charles Chapman). Joffrey is guarded by the scar-faced
Game_of_Thrones
King of Scotland from 1567 to 1625, King of England and Ireland from 1603
18 October 2011. Jack, R. D. S. (1985), Alexander Montgomerie, Edinburgh: Scottish Academic Press, pp. 1–2. Jack 1988, p. 125. Jack 1988, p. 137. Spiller
James_VI_and_I
American biochemist
Biochemistry at Harvard University, specializing in the structure and function of human histocompatibility proteins and their role in disease. He won
Jack_L._Strominger
1847 novel by Emily Brontë
literary device, a well-known convention taken from the Gothic novel, the function of which is to portray the events more mysteriously and excitingly. Thus
Wuthering_Heights
Number
zero function (or zero map) on a domain D. This is the constant function with 0 as its only possible output value, that is, it is the function f defined
0
Statistical inequality
determined distribution function from its associated population distribution function. It is named after Aryeh Dvoretzky, Jack Kiefer, and Jacob Wolfowitz
Dvoretzky–Kiefer–Wolfowitz inequality
Dvoretzky–Kiefer–Wolfowitz_inequality
parades by the military units. In the past, the colours had a practical function, being used as a signal to guide the military units in battle. Originally
Flag_of_Portugal
American lawyer (born 1969)
Commons has media related to Jack Smith (lawyer). Wikiquote has quotations related to Jack Smith (lawyer). Special Counsel Jack Smith | Department of Justice
Jack_Smith_(lawyer)
American computer scientist and biophysicist
Jack Y. Yang is an American computer scientist and biophysicist. As of 2011, he is the editor-in-chief of the International Journal of Computational Biology
Jack_Yang
Secret police of the Soviet Union (1934–1946)
organization, and thus had a monopoly on intelligence and state security functions. The NKVD is known for carrying out political repression and the Great
NKVD
Reproductive structure in flowering plants
the flower forms into a fruit, and the other floral structures die. The function of fruit is to protect the seed and aid in its dispersal away from the
Flower
Word processor
the general public. It was also notable for its very fast cut-and-paste function and unlimited number of undo operations, which are due to its usage of
Microsoft_Word
Second season of Avatar: The Last Airbender animation series
Konietzko for Nickelodeon. The series starred Zach Tyler Eisen, Mae Whitman, Jack DeSena, Jessie Flower, Dante Basco, Dee Bradley Baker, Mako Iwamatsu (in
Avatar: The Last Airbender season 2
Avatar:_The_Last_Airbender_season_2
Device for tracking stolen vehicles
LoJack is a stolen vehicle recovery and IoT-connected car system that uses GPS and cellular technology to locate users' vehicles, view trip history, see
LoJack
Association football position
(which, at the time, was similar to the modern centre-back role) free to function as what was essentially a sweeper, creating a 1–3–3–3 formation; he occasionally
Defender (association football)
Defender_(association_football)
Consensual authority-exchange structured sexual relationship
people. Otherwise, a sex slave may be expected to perform many of the same functions that are expected of a slave/submissive, including wearing very revealing
Master/slave_(BDSM)
American professional golfer (1910–1989)
there by your side. In other words, Jack Grout worked to be dispensable. He wanted his students to be able to function at the highest level without him.”
Jack_Grout
Cast of neo-Western crime media franchise
that Walt will meet with Jack, then tells Todd to make sure Jack kills Walt at the meeting. Walt uses the meeting to kill Jack and his gang with a machine
List of characters in the Breaking Bad franchise
List_of_characters_in_the_Breaking_Bad_franchise
American stockbroker (born 1962)
accountants. He has an older brother named Robert. His paternal grandfather, Jack Belfort (1904–1970), was an immigrant from Russia, while his grandmother
Jordan_Belfort
English musician (born 1943)
for the theatrical show parody "Jumpin' Jack", written by Lyle Victor Albert. In the show, the protagonist, Jack, is "a member of that ever-expanding, worldwide
Mick_Jagger
Totality of psychological phenomena
the number and capacity of mental functions increased with particular brain areas dedicated to specific mental functions. Individual human minds also develop
Mind
British period crime drama series
as Liam (series 6), an associate of Jack Nelson's. Peter Coonan as Connor Dunn (series 6), an associate of Jack Nelson's. Assaad Bouab as Henri (series
Peaky_Blinders_(TV_series)
American politician (born 1947)
3, 2017. "Jack Bergman's Linkedin page". "Roll Call Member Profile - Rep. Jack Bergman, R-Mich". Roll Call. Retrieved March 11, 2021. "Jack Bergman".
Jack_Bergman
Erotic roleplay involving the submission of one person to another
PMID 25795531. Rinella, Jack (1994). The Master's Manual: A Handbook of Erotic Dominance. Daedelus Publishing Co. ISBN 1-881943-03-8. Rinella, Jack (2002). The Compleat
Dominance_and_submission
American computer engineer (1944–2016)
already advised Steve Bales that the computer could be relied upon to function adequately so long as the alarms did not become continuous. Bales, who
Jack_Garman
1995 crime drama film by Michael Mann
project as co-author. On May 15, 2020, Mann stated that the novel would function as both a prequel and a sequel, with plot taking place before and after
Heat_(1995_film)
English actor (1922–1992)
for Best Actor in a Supporting Role for Trading Places (1983), A Private Function (1984) and Defence of the Realm (1986), and a nomination for the Academy
Denholm_Elliott
American gay rights activist (1930–1978)
store to borrow a projector because the equipment in the schools did not function. Friends also remember around the same time having to restrain him from
Harvey_Milk
Japanese video game company
Persona, Etrian Odyssey, and Trauma Center series. Its corporate mascot is Jack Frost, a snowman-like character from its Megami Tensei series. The company
Atlus
Computation model defining an abstract machine
\rightharpoonup Q\times \Gamma \times \{L,R\}} is a partial function called the transition function, where L is left shift, R is right shift. If δ {\displaystyle
Turing_machine
American serial killer (1942–1994)
policeman called Jack Hanley, whom he referred to as "Bad Jack". When Gacy had confessed to police, he claimed to be relaying the crimes of Jack, who detested
John_Wayne_Gacy
American drama television series (1990–91, 2017)
Renault is the murderer, and with Truman's help, tracks Renault to One-Eyed Jack's, a brothel owned by Horne across the border in Canada. He lures Renault
Twin_Peaks
Symbolic serpent with its tail in its mouth
solutions of the self-referential Ouroborus equation f(f) = f, for an unknown function f, a way that mathematicians had not imagined before Rosen. Second-order
Ouroboros
American music executive (1932–2026)
the Grateful Dead occasionally changed the lyrics of the Dead standard "Jack Straw" in concert from "we used to play for silver, now we play for life"
Clive_Davis
2017 American crime drama television series
(seasons 2–3), an assistant district attorney who begins working with Hodges Jack Huston as Felix Babineau (season 2), a skilled neurosurgeon Tessa Ferrer
Mr._Mercedes_(TV_series)
British science fiction TV series (1963–2025)
retain their memories, their personality changes. The different portrayals function as distinct stages within a single, continuous narrative. Due to time travel
Doctor_Who
2024 American fantasy comedic television series
when he was a child. Tara Strong as Ted's "I Love You" sound bite replay function. MacFarlane also portrays Bill Clinton in the second season Max Burkholder
Ted_(TV_series)
Object or record accepted as payment
taxes, in a particular country or socio-economic context. The primary functions which distinguish money are: medium of exchange, a unit of account, a
Money
Mental disorder
distress caused by the obsession, to the extent where it impairs general function. OCD has been described since antiquity and has affected numerous notable
Obsessive–compulsive_disorder
Transmission of information
sentences and convey meaning. Verbal communication serves various functions. One key function is to exchange information, i.e. an attempt by the speaker to
Communication
American writer
Preservation by Jack Skillingstead". Strange Horizons. Archived from the original on 4 October 2013. Retrieved 17 June 2014. The Chaos Function title listing
Jack_Skillingstead
Electronic musician
We are DMX (1999) The Collapse of the Wave Function LP (2004) Many Worlds (The Collapse Of The Wave Function Volume 4) (2005) The Transactional Interpretation
DMX_Krew
Primary sexual organ of male animals
there is an organ that might be described as a penis, it has no major function other than intromission, or at least conveying the sperm to the female
Penis
1912 maritime disaster
is unclear whether or not this message left the Titanic's radio room as Jack Phillips, the radio operator on watch at the time, did not survive. He acknowledged
Sinking_of_the_Titanic
Checking software against expectations
from a serialization function should be accepted by the corresponding deserialization function, and every output from a sort function should be a monotonically
Software_testing
American exercise physiologist and coach (1933–2025)
Jack Tupper Daniels (April 26, 1933 – September 12, 2025) was an American exercise physiologist, running coach and a coach of Olympic athletes. Named "The
Jack_Daniels_(coach)
International governing body of association football
Hammam and Jack Warner". BBC News. 29 May 2011. Archived from the original on 1 June 2011. Retrieved 9 July 2011. "Fifa Soap Opera Latest: Jack Warner Says
FIFA
Laboratory equipment
Laboratory scissor jacks are lifting stages for beakers, flasks, water baths, stirrer, or other lab tools used to elevate equipment height to the user's
Laboratory_scissor_jack
Oral sex on the vulva by a sexual partner
biker gangs in the 1980s. Gershon Legman saw the act/badge not only as functioning a homosocial tie, but also as reflecting a deep and primitive belief
Cunnilingus
American actor (1936–2024)
picture,[citation needed] the comedy Operation Mad Ball (1957), starring Jack Lemmon and Ernie Kovacs. He had support roles in two films directed by Phil
James_Darren
French politician (born 1939)
Jack Mathieu Émile Lang (French: [dʒak matjø emil lɑ̃ɡ]; born 2 September 1939) is a French politician. A member of the Socialist Party, he served as Minister
Jack_Lang_(French_politician)
JACK FUNCTION
JACK FUNCTION
Surname or Lastname
English
English : from an Old English personal name, Dæcca.Dutch : metonymic occupational name for a roofer, from dack, a variant of deck ‘roof’. Compare De decker.
Boy/Male
American, Anglo, Australian, British, Celebrity, Chinese, Christian, Danish, Dutch, English, French, German, Hebrew, Indian, Jamaican, Latin, Polish, Swedish, Swiss, Tamil
God is Gracious; Son of Jack; He who Supplants; Diminutive of Jack; Supplanter
Female
Native American
Native American Tupi name JACI means "moon."
Surname or Lastname
English (Kentish)
English (Kentish) : from a medieval personal name, Pack, possibly a survival of the Old English personal name Pacca, although this is found only as a place name element and appears to have died out fairly early on in the Old English period. The Middle English personal name is more likely to be a derivative of the Latin Christian name Paschalis (see Pascal).Jewish (Ashkenazic) : metonymic occupational name for a wholesale trader, from German Pack ‘package’ (see Packer).Anglicized form of Dutch Pak.
Male
Finnish
Short form of Finnish Jaako, JAAK means "supplanter."
Boy/Male
Shakespearean American Hebrew Polish English
Henry VI, Part 2' Jack Cade, a rebel.
Male
English
Short form of English Zackary, ZACK means "whom Jehovah remembered."Â
Surname or Lastname
English and North German
English and North German : patronymic from Jack.
Boy/Male
American, Australian, British, English, French, German, Hebrew, Scottish, Swedish, Swiss
Son of Jack; He who Supplants; God has been Gracious; Has Shown Favor; Based on John or Jacques; God is Gracious
Surname or Lastname
English, German, and Jewish (Ashkenazic)
English, German, and Jewish (Ashkenazic) : metonymic occupational name for a maker of sacks or bags, from Old English sacc, Middle High German sack, German Sack ‘sack’. Bahlow also suggests someone who carried sacks.German : topographic from Middle High German sack ‘sack’, ‘end of a valley or area of cultivation’.Dutch : from a reduced form of the personal name Zacharias.Jewish (eastern Ashkenazic) : from an acronym of the Hebrew phrase Zera Keshodim ‘Seed of the Holy’ (referring to martyred ancestors), or from a short form of the personal name Isaac.
Surname or Lastname
Scottish and English
Scottish and English : from a Middle English personal name, Jakke, from Old French Jacques, the usual French form of Latin Jacobus, which is the source of both Jacob and James. As a family name in Britain, this is almost exclusively Scottish.English and Welsh : from the same personal name as 1, taken as a pet form of John.German (also Jäck) : from a short form of the personal name Jacob.Americanized form of one or more like-sounding Jewish surnames.
Male
English
Originally a short form of surnames, mostly Scottish, beginning with Mac-, MACK means "son of," it is now sometimes given as a forename.Â
Male
Polish
Modern form of Polish Jacenty, JACEK means "hyacinth flower."
Surname or Lastname
English
English : from Middle English bakke ‘back’ (Old English bæc), hence a nickname for someone with a hunched back or some other noticeable peculiarity of the back or spine, or a topographic name for someone who lived on a hill or ridge, or at the rear of a settlement.English : from the Old English personal name Bacca, which was still in use in the 12th century. It is of uncertain origin, but may have been a byname in the same sense as 1.English : nickname from Middle English bakke ‘bat’ (apparently of Scandinavian origin), from some fancied resemblance to the animal.Altered spelling of Bach 1, 2, or 6.North German : from Middle Low German back ‘kneading trough’, hence a metonymic occupational name for someone who made or used such vessels.Americanized spelling of Norwegian Bakk(e) (see Bakke).
Surname or Lastname
English (Cornwall and Wales)
English (Cornwall and Wales) : variant of Jack.Czech (JaÄka), Polish, and German (of Slavic origin) : from a pet form (Czech JaÄ, Polish Jacz) of any of the various Slavic personal names beginning with Ja-, for example Jakub, Jan, Jacenty (see Jacek).
Male
English
Probably originally an Anglicized form of French Jacques, JACK means "supplanter," it is now considered a pet form of English John, meaning "God is gracious."
Female
English
Pet form of English Jackalyn, JACKI means "supplanter."
Boy/Male
Christian & English(British/American/Australian)
Godly
Male
English
Scottish form of English Jack, JOCK means "God is gracious."
Girl/Female
Australian, Netherlands, Portuguese
Variant of Jack
JACK FUNCTION
JACK FUNCTION
Girl/Female
Hindu, Indian
Goddess Durga; Laxmi
Girl/Female
Australian, Greek, Slavic
Slavic Form of Nicole
Boy/Male
Australian, Gaelic, Irish, Scottish
Hillside; Twin; Similar to the Word Teeve
Boy/Male
Arabic, Hindu, Indian, Muslim
King of Noble Men
Boy/Male
Hindu
Son of Lord Shiva (Ganesh, Kartikeya) shivanandan
Boy/Male
Hindu
Boy/Male
Hindu
Always truthful' href='Boy-Names-for-Meaning-truthful.aspx'>truthful, Lord Rama, Speaker of truth
Female
Egyptian
, house of Horus.
Girl/Female
Hindu
Pleased
Girl/Female
Latin
JACK FUNCTION
JACK FUNCTION
JACK FUNCTION
JACK FUNCTION
JACK FUNCTION
n.
A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
v. t.
To bear or carry in a sack upon the back or the shoulders.
n.
See Jack-with-a-lantern, under 2d Jack.
v. t.
To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5.
n.
see Ils Jack.
n.
A machine or contrivance for turning a spit; a smoke jack, or kitchen jack.
n.
A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat.
v. i.
To make a back for; to furnish with a back; as, to back books.
v. i.
To write upon the back of; as, to back a letter; to indorse; as, to back a note or legal document.
n.
A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack.
n.
A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State.
n.
A pitcher or can of waxed leather; -- called also black jack.
n.
An envelope, or wrapping, of sheets used in hydropathic practice, called dry pack, wet pack, cold pack, etc., according to the method of treatment.
n.
To make a pack of; to arrange closely and securely in a pack; hence, to place and arrange compactly as in a pack; to press into close order or narrow compass; as to pack goods in a box; to pack fish.
adv.
In, to, or toward, the rear; as, to stand back; to step back.
n.
A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack
v. i.
To hunt game at night by means of a jack. See 2d Jack, n., 4, n.
v. t.
To put in a sack; to bag; as, to sack corn.
n.
A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; -- called also jack crosstree.
a.
Being at the back or in the rear; distant; remote; as, the back door; back settlements.