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Latin term meaning "from the beginning"
Ab initio (/ˌæb ɪˈnɪʃioʊ/ AB in-ISH-ee-oh) is a Latin term meaning "from the beginning" and is derived from the Latin ab ("from") + initio, ablative singular
Ab_initio
Legal doctrine re death of defendant
Abatement ab initio (Latin for "from the beginning") is a common law legal doctrine that states that the death of a defendant who is appealing a criminal
Abatement_ab_initio
2003 studio album by Trivium
years after the initial announcement by Heafy. The re-release is dubbed Ab Initio, Latin for "From the Beginning". "Pillars of Serpents" was re-recorded
Ember_to_Inferno
Computer simulations to discover and understand chemical properties
other molecules, as in ligand docking. In principle, MD can be used for ab initio prediction of protein structure by simulating folding of the polypeptide
Molecular_dynamics
American enterprise software corporation
Ab Initio Software is an American software corporation based in Lexington, Massachusetts. The company specializes in developing software for managing
Ab_Initio_Software
Topics referred to by the same term
ab initio in Wiktionary, the free dictionary. Ab initio is a Latin term used in English, meaning from the beginning. Ab initio may also refer to: Ab Initio
Ab_initio_(disambiguation)
Aircraft designed for training of pilots and aircrew
a light aircraft not too dissimilar from civilian training aircraft; ab initio meaning “from the beginning” in Latin. In this phase, pilot candidates
Trainer_aircraft
Absence of legal effect
happened. The term void ab initio, which means "to be treated as invalid from the outset", comes from adding the Latin phrase ab initio (from the beginning)
Void_(law)
2013 murder in North Attleborough, Massachusetts
Massachusetts Supreme Judicial Court overturned the entire doctrine of abatement ab initio, thus reinstating his original murder conviction. Odin Leonardo John Lloyd
Murder_of_Odin_Lloyd
Subject group in the International Baccalaureate program
offered and may be studied at the following levels: B (SL or HL), or ab initio (SL only). Latin and Classical Greek are also offered and may be taken
IB_Group_2_subjects
Type of biological prediction
the use of the predictions as feature improving fold recognition and ab initio protein structure prediction, classification of structural motifs, and
Protein_structure_prediction
State of matter
these must be approximated using experimental data or some other input. Ab initio quantum mechanical methods simulate liquids using only the laws of quantum
Liquid
Process in computational biology
isolation, independent of others, which is not biologically accurate. Ab Initio gene prediction is an intrinsic method based on gene content and signal
Gene_prediction
Describes the range of energies of an electron within the solid
to predict the band structure of a particular material, however most ab initio methods for electronic structure calculations fail to predict the observed
Electronic_band_structure
Computational quantum mechanical modelling method to investigate electronic structure
in such conditions. In the context of computational materials science, ab initio (from first principles) DFT calculations allow the prediction and calculation
Density_functional_theory
Category of computational quantum chemistry technique
Ab initio quantum chemistry methods are a class of computational chemistry techniques based on quantum chemistry that aim to solve the electronic Schrödinger
Ab initio quantum chemistry methods
Ab_initio_quantum_chemistry_methods
Molecule containing main group elements with more than eight valence electrons
Preliminary ab initio calculations supported this hypothesis to some degree, but used a small basis set. A software program for ab initio calculations
Hypervalent_molecule
Predicting 3D protein structure from its sequence
structure from an initial model: ab initio protein prediction, fold recognition, and threading. Ab Initio Methods: In ab initio methods, an initial effort to
De novo protein structure prediction
De_novo_protein_structure_prediction
British theoretical chemist (1925–2004)
pioneered the development of more sophisticated computational methods, called ab initio quantum chemistry methods, that use basis sets of either Slater type orbitals
John_Pople
Branch of chemistry
early 1970s, efficient ab initio computer programs such as ATMOL, Gaussian, IBMOL, and POLYAYTOM, began to be used to speed ab initio calculations of molecular
Computational_chemistry
simulations based on the time-dependend Boltzmann equation, parameterized from ab initio, have been widely used to describe non-equilibrium processes involving
Quantum_Boltzmann_equation
In nuclear physics, ab initio methods seek to describe the atomic nucleus from the bottom up by solving the non-relativistic Schrödinger equation for
Ab initio methods (nuclear physics)
Ab_initio_methods_(nuclear_physics)
Software for condensed matter physics
The Vienna Ab initio Simulation Package, better known as VASP, is a package written primarily in Fortran for performing ab initio quantum mechanical calculations
Vienna Ab initio Simulation Package
Vienna_Ab_initio_Simulation_Package
structure prediction, including homology modeling, protein threading, ab initio methods, secondary structure prediction, and transmembrane helix and signal
List of protein structure prediction software
List_of_protein_structure_prediction_software
Combining multiple simulation methods
available via keywords in the Gaussian 09 suite of programs. The Weizmann-n ab initio methods (Wn, n = 1–4) are highly accurate composite theories devoid of
Quantum chemistry composite methods
Quantum_chemistry_composite_methods
Basic proposition or assumption
other sciences, theoretical work is said to be from first principles, or ab initio, if it starts directly at the level of established science and does not
First_principle
Molecular ion
ratio of the proton mass and the electron mass. Using a sophisticated ab initio formalism, also the hyperfine energies can be computed accurately, see
Dihydrogen_cation
American football player and murderer (1989–2017)
Lloyd's murder was initially vacated under the doctrine of abatement ab initio because Hernandez died during its appeal, but was reinstated in 2019 following
Aaron_Hernandez
Computational chemistry software package
is one of the major methods for calculating ab initio molecular dynamics (ab initio MD or AIMD). Ab initio molecular dynamics (AIMD) is a computational
Car–Parrinello molecular dynamics
Car–Parrinello_molecular_dynamics
American technology executive
Brobst joined Ab Initio Software as chief technology officer in January of 2024. He had previously worked with the co-founders of Ab Initio Software in
Stephen_Brobst
American biochemist and computational biologist (born 1962)
scientific papers. Baker's group developed the Rosetta algorithm for ab initio protein structure prediction, which has been extended into a tool for
David_Baker_(biochemist)
Method in quantum chemistry
The ab initio multiple spawning, or AIMS, method is a time-dependent formulation of quantum chemistry. In AIMS, nuclear dynamics and electronic structure
Ab_initio_multiple_spawning
Narrative technique
chronological middle of the plot, rather than at the beginning (cf. ab ovo, ab initio). Often, exposition is initially bypassed, instead filled in gradually
In_medias_res
electronic, transport and phase properties is possible with modern methods. Ab initio or first principles calculations are any of a number of software packages
Prediction of crystal properties by numerical simulation
Prediction_of_crystal_properties_by_numerical_simulation
British jet trainer aircraft
School (CFS) of the RAF to determine the value of the Jet Provost in the ab initio training role and to develop a syllabus for the training program. During
BAC_Jet_Provost
Resistance of a fluid to shear deformation
the simplest fluids, such as dilute monatomic gases and their mixtures, ab initio quantum mechanical computations can accurately predict viscosity in terms
Viscosity
Capacity of a material to conduct heat
such as monatomic gases and their mixtures at low to moderate densities, ab initio quantum mechanical computations can accurately predict thermal conductivity
Thermal conductivity and resistivity
Thermal_conductivity_and_resistivity
Method in ab initio Quantum Chemistry
perturbation theory (MP) is one of several quantum chemistry post-Hartree–Fock ab initio methods in the field of computational chemistry. It improves on the Hartree–Fock
Møller–Plesset perturbation theory
Møller–Plesset_perturbation_theory
1942 assassination in Prague
Czechoslovakia's pre-Munich borders, nor did it declare the Munich agreement void ab initio, as Czechoslovakia wanted. Thus, the statement has been questioned as
Assassination of Reinhard Heydrich
Assassination_of_Reinhard_Heydrich
2020. Retrieved April 4, 2020. McConnell, Danny. "Full List of Games". Ab Initio Games. Retrieved November 11, 2022. "PBM Game Ratings: As of 11/18/94"
List_of_play-by-mail_games
American model and actress (born 1956)
Bali, Indonesia. The putative marriage was later declared null and void ab initio by the High Court of England and Wales in 1999, ruling that the "marriage"
Jerry_Hall
Proteogenomics is a field of biological research that utilizes a combination of proteomics, genomics, and transcriptomics to aid in the discovery and identification
Proteogenomics
Isotope of Carbon
occur by emission of gamma rays into the ground state of 12C. In 2011, an ab initio calculation of the low-lying states of carbon-12 found (in addition to
Carbon-12
Study of the structure of every protein in a genome
experimental data elucidate. A genomic, modeling-based approach such as ab initio modeling may be better able to identify novel protein folds than the experimental
Structural_genomics
Roman scholar, writer and historian (c. 54 BC – c. AD 39)
name (in the subscriptio) are more compatible with Seneca's own ' ... ab initio b[ell]orum [civilium] ' than with his declamatory anthology. Unfortunately
Seneca_the_Elder
Averaging technique for electron diffraction
the predominant experimental method used to solve crystal structures ab initio, the advantages of precession electron diffraction make it one of the
Precession electron diffraction
Precession_electron_diffraction
Cluster of water molecules held together through hydrogen bonding
water Richard J. Saykally Xantheas, Sotiris; Dunning Jr., Thorn (1993). "Ab initio studies of cyclic water clusters (H2O)n, n=1–6. I. Optimal structures
Water_cluster
American supercomputer and AI firm (1983–1994)
helped create several parallel computing software start-ups, including Ab Initio Software; and Applied Parallel Technologies, which was later renamed Torrent
Thinking_Machines_Corporation
Legal procedure for declaring a marriage null and void
the laws of the jurisdiction where the marriage occurred, and is void ab initio. Although the marriage is void as a matter of law, in some jurisdictions
Annulment
List of aircraft used by the Indonesian Air Force
Basic trainer KT-1B 16 Grob G120 Germany Ab initio trainer G120TP 30 Cessna T-41 Mescalero United States Ab initio trainer T-41D 1 IAe NC212 Spain / Indonesia
List of equipment of the Indonesian Air Force
List_of_equipment_of_the_Indonesian_Air_Force
Force that acts between the protons and neutrons of atoms
basic interactions between nucleons. This is called the microscopic or ab initio approach of nuclear physics. There are two major obstacles to overcome:
Nuclear_force
American businesswoman
one of the founders of Thinking Machines. She is the founder and CEO of Ab Initio. Handler attended Case Western Reserve University for interior design
Sheryl_Handler
Alloys with high proportions of several metals
under investigation. Combining experiments with CALPHAD modeling and ab initio simulations is seen as a promising route to systematically design HEAs
High-entropy_alloy
Adverb meaning "from the beginning"
American English phrase "soup to nuts". Thus ab ovo can also be used to mean a complete or entire thing. Ab initio List of Latin phrases Helen of Troy: From
Ab_ovo
Branch of physics
treatment (ab initio, MD, or BTE) is selected. Heat transfer physics analyses may involve multiple scales (e.g., BTE using interaction rate from ab initio or
Heat_transfer_physics
Knowledge acquired by means of the senses
opposed to theoretical ab initio methods, which are purely deductive and based on first principles. Typical examples of both ab initio and semi-empirical
Empirical_evidence
Issue in determining wave cycle part
Protein Electron Crystallography – Phase Extension and the Prospects for Ab Initio Determinations". Acta Crystallographica Section A. 52 (3): 480–489. Bibcode:1996AcCrA
Phase_problem
German chemist, professor emeritus and husband of Angela Merkel (born 1949)
"Interaction of Methanol With Bronsted Acid Sites Of Zeolite Catalysts – An Ab-Initio Study". Journal of the American Chemical Society. 117 (13): 3780–3789
Joachim_Sauer
Mechanism of spontaneous symmetry breaking
was born. A further breakthrough occurred upon the advent of modern ("ab initio") electronic structure calculations whereby the relevant parameters characterising
Jahn–Teller_effect
crystals. It was developed by Steven G. Johnson and collaborators at ab initio research group at Massachusetts Institute of Technology in 1999. Operating
MPB_(software)
American physicist (1947–2025)
Efthimios. "Ab Initio theory of polar surfaces of binary compound semiconductors". MIT Libraries. Retrieved August 20, 2025. Rabe, Karin. "Ab initio statistical
John_Joannopoulos
Method in quantum chemistry
results that best agree with experimental data, but sometimes to agree with ab initio results. Semi-empirical methods follow what are often called empirical
Semi-empirical quantum chemistry method
Semi-empirical_quantum_chemistry_method
Third planet from the Sun
"The fate of Earth during the Sun's giant phases – New constraints from ab initio tidal modelling and AGB mass loss", Astronomy & Astrophysics, 710: L26
Earth
Trivium released a deluxe edition of debut album Ember to Inferno subtitled Ab Initio, which contained both early demos as well as the 2004 Flavus demo. The
Trivium_discography
Subatomic particle with positive charge
Kurth, T.; Lellouch, L.; Lippert, T.; Szabo, K.K.; Vulvert, G. (2008). "Ab Initio Determination of Light Hadron Masses". Science. 322 (5905): 1224–1227
Proton
Remedy which allows a contractual party to cancel the contract
are only discharged prospectively; the contract is not rendered void ab initio. Rescission in the sense of termination covers two key situations: First
Rescission_(contract_law)
Chemical element with atomic number 86 (Rn)
value) was questioned in 1925 by Friedrich Paneth and E. Rabinowitsch, but ab initio Monte Carlo simulations from 2018 agree almost exactly with Ramsay and
Radon
Subsidiary of Alphabet
Xiao-Shuang; Shi, Hang; Chang, Shan (2020). "Template-based modeling and ab-initio docking using CoDock in CAPRI". Proteins: Structure, Function, and Bioinformatics
Isomorphic_Labs
Chemical compound
anion compound composed of hafnium (Hf), carbon (C) and nitrogen (N). Ab initio molecular dynamics calculations have predicted the HfCN (specifically
Hafnium_carbonitride
Current aircraft of the Indian Armed Forces
order Pilatus PC-7 Switzerland PC-7 Mk II 74 Pipistrel Virus Slovenia Ab-initio trainer Garud 72 UAV IAI Heron Israel Surveillance Heron Mk II 9 2 on
List of active Indian military aircraft
List_of_active_Indian_military_aircraft
Air warfare and space branch of the Australian Defence Force
Communications No. 1 RSU – Wide Area Surveillance No. 1 RTU – Airman Ab Initio Training No. 2 SECFOR SQN – Airbase Force Protection No. 2 EHS – Health
Royal_Australian_Air_Force
Any derivative of oxalic acid; chemical compound containing oxalate moiety
"Conformational preferences of 34 valence electron A2X4 molecules: An ab initio Study of B2F4, B2Cl4, N2O4, and C 2O2− 4". Journal of Computational Chemistry
Oxalate
Educational programme
Language ab initio (SL only). Language B courses are meant for students with some prior experience in the language, while Language ab initio is meant
IB_Diploma_Programme
Lithuania and Vietnam. It offers a wide range of programs, including Ab Initio, Type Rating, Cabin Crew, and Flight Dispatcher training. BAA Training
BAA_Training_Aviation_Academy
Trainer aircraft family by Pilatus of Switzerland
The type has been adopted by in excess of twenty air forces as their ab initio trainer, as well as multiple civilian operators. Over one million hours
Pilatus_PC-7
Approximations in density functional theory
with the rest of the exchange–correlation energy from other sources (ab initio or empirical). The exact exchange energy functional is expressed in terms
Hybrid_functionals
Technique used for determining crystal structures and identifying mineral compounds
atomic positions against the experimental data, sometimes assisted by ab-initio calculations. In almost all cases new structures are deposited in databases
X-ray_crystallography
Family of Canadian training aircraft
slowly phased out of service beginning in the late 1950s, although in the ab initio elementary training role, this did not happen in the Royal Air Force until
De Havilland Canada DHC-1 Chipmunk
De_Havilland_Canada_DHC-1_Chipmunk
Contract that is not enforceable at law
ab initio, i e from the beginning while a voidable contract can be voidable by one or all of the parties. A voidable contract is not void ab initio,
Void_contract
Mayor of Bamban from 2022 to 2024
Regional Trial Court Branch 34 declared her term as mayor null and void ab initio, rendering her tenure de facto and ruling that she was, in fact, a Chinese
Alice_Guo
Molecular simulation method
approach is a molecular simulation method that combines the strengths of ab initio QM calculations (accuracy) and MM (speed) approaches, thus allowing for
QM/MM
Concept in contract law
successfully, can lead to the agreement in question being found void ab initio or voidable, or alternatively, an equitable remedy may be provided by
Mistake_(contract_law)
Core of an atom composed of nucleons
computational power is required to accurately compute the properties of nuclei ab initio. Developments in many-body theory have made this possible for many low
Atomic_nucleus
Chemical element with atomic number 112 (Cn)
analogous bonds with mercury. In opposition to the earlier suggestion, ab initio calculations at the high level of accuracy predicted that the chemistry
Copernicium
composition and external conditions (pressure, temperature): AIRSS - Ab Initio Random Structure Searching based on stochastic sampling of configuration
Crystal_structure_prediction
Bioengineering process
energy. some examples of ab initio methods are AMBER, GROMOS, GROMACS, CHARMM, OPLS, and ENCEPP12. General steps for ab initio methods begin with the geometric
Protein_engineering
Materials simulation software
FHI-aims (Fritz Haber Institute ab initio materials simulations) is a software package for computational molecular and materials science written in Fortran
FHI-aims
Method for approximating many-body systems
many-body systems. Its most common use is as one of several post-Hartree–Fock ab initio quantum chemistry methods in the field of computational chemistry, but
Coupled_cluster
Computational method in Chemistry
calculate very large molecular systems with thousands of atoms using ab initio quantum-chemical wave functions. The fragment molecular orbital method
Fragment_molecular_orbital
Model of the atomic nucleus
active. This forms the basis of the no-core shell model, which is an ab initio method. It is necessary to include a three-body interaction in such calculations
Nuclear_shell_model
Cage-like allotrope of carbon
Nevill; Sadrzadeh, Arta; Yakobson, Boris (2007). "B80 Fullerene: An Ab Initio Prediction of Geometry, Stability, and Electronic Structure". Physical
Buckminsterfullerene
Field of physics that studies atomic interactions
boson model, in which pairs of neutrons and protons interact as bosons. Ab initio methods try to solve the nuclear many-body problem from the ground up
Nuclear_physics
Open source software
of molecules, liquids, and solids. It implements first principles (or ab initio) molecular dynamics, a simulation method in which inter-atomic forces
Qbox
printing press c. AD 1500. ab initio from the beginning i.e., "from the outset", referring to an inquiry or investigation. Ab initio mundi means "from the
List_of_Latin_phrases_(A)
British pilot (1923–2017)
a British pilot having joined the Air Transport Auxiliary (ATA) as an ab initio pilot in December 1943. She went on to fly Spitfires and bombers for the
Joy_Lofthouse
Two water molecules held together by a hydrogen bond; the simplest water cluster
experimental) studies that it has been called a "theoretical Guinea pig". The ab initio binding energy between the two water molecules is estimated to be 5-6
Water_dimer
Electrons that are not associated with a single atom or covalent bond
does not conduct in a direction at right angles to the plane. Standard ab initio quantum chemistry methods lead to delocalized orbitals that, in general
Delocalized_electron
Polytomic cation (N–N–N–N–N)
crystal structure analysis possible. Actually N+5 had been predicted by ab initio calculations as a member of the dicyanamide isoelectronic series by Pyykkö
Pentazenium
Head of the Catholic Church from 1740 to 1758
Bullarium: In quo continentur constitutiones, epistolae, aliaque edita ab initio pontificatus usque ad annum MDCCXLVI (in Latin). Vol. Tomus primus, Volumen
Pope_Benedict_XIV
BOINC based volunteer computing project researching protein folding
to atomic-level resolution, ab initio protein structure prediction in its submitted model for CASP target T0281. Ab initio modeling is considered an especially
Rosetta@home
AB INITIO
AB INITIO
Boy/Male
Muslim
Example
Male
Egyptian
, the father of Aaab.
Female
Egyptian
, the daughter of the prophet Ra-nofre-ab.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : nickname for someone who was handy with his fists, from Old French poigneor ‘fighter’ (Latin pugnator, from pugnare ‘to fight’, a derivative of pugnus ‘fist’).Welsh : Anglicized form of Welsh ab Ynyr ‘son of Ynyr’, a personal name from Latin Honorius.
Boy/Male
Welsh
Son of Owen.
Surname or Lastname
English
English : from Middle English blÅwere ‘one who blows’. The name was applied chiefly to someone who operated a bellows, either as a blacksmith’s assistant or to provide wind for a church organ. In other cases it was applied to someone who blew a horn, i.e. a huntsman or a player of the musical instrument.Welsh : Anglicized form of Welsh ab Llywarch ‘son of Llywarch’. Compare Flower.
Surname or Lastname
English of Welsh origin
English of Welsh origin : Anglicized form of Welsh ab elfyn ‘son of Elfyn’.
Surname or Lastname
Scottish and northern English
Scottish and northern English : nickname meaning ‘bones’. Compare Bain 2.Scottish : reduced form of McBane, with English patronymic -s.English, of Welsh origin : Anglicized form of Welsh ab Einws ‘son of Einws’, a pet form of the personal name Einon (see Eynon).English : from a derivative of Bain.
Male
Egyptian
, the father of Nes-em-ab.
Boy/Male
Indian
Example
Male
English
Short form of Hebrew Abraham, ABE means "father of a multitude,"Â and other names beginning with Ab-.
AB INITIO
AB INITIO
Girl/Female
Tamil
Ritwika | ரீதà¯à®µà®¿à®•à®¾
Surname or Lastname
English, Scottish, Dutch, German, and Catalan
English, Scottish, Dutch, German, and Catalan : patronymic from the personal name Roman.
Girl/Female
Arabic
Separate
Male
English
Pet form of English Scott, SCOTTIE means "Scotsman."
Surname or Lastname
English
English : variant spelling of Reader.Dutch : variant of Reeder 2.North German and Dutch : from a Germanic personal name composed of the elements rÄd ‘counsel’ + heri ‘army’.North German and Dutch : occupational name for a ship owner or outfitter, from an agent derivative of Middle Low German rÄd ‘counsel’; ‘provisions’, ‘stock’.North German : habitational name from any of various places named Rieder (earlier Redere) or Reher (earlier Rethere) in northern Germany.Possibly an altered spelling of German Röder (see Roeder).
Girl/Female
African, Danish, English, French, Hebrew, Indian, Italian, Japanese, Latin, Malayalam, Swedish, Tamil
Princess; Burning One; Serpent; Wife of Abraham
Girl/Female
Egyptian
Wanted.
Girl/Female
Hindu, Indian, Marathi
Who Forgives
Girl/Female
Latin
Furies.
Girl/Female
Indian
Useful, Helpful, Beneficial, Advantageous
AB INITIO
AB INITIO
AB INITIO
AB INITIO
AB INITIO
n.
A member of a compound quantity; as, a or b in a + b; ab or cd in ab - cd.
n.
Initiation; beginning.
n.
The fifth month of the Jewish year according to the ecclesiastical reckoning, the eleventh by the civil computation, coinciding nearly with August.