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Lowest temperature at which a substance spontaneously combusts
The autoignition temperature (often called self-ignition temperature, spontaneous ignition temperature, minimum ignition temperature, or shortly ignition
Autoignition_temperature
Lowest temperature at which a volatile material's vapors ignite if given a source
The flash point is also sometimes confused with the autoignition temperature, the temperature that causes spontaneous ignition. Neither flash point
Flash_point
Process of starting a fire artificially
completing the fire triangle, usually by heating tinder above its autoignition temperature. Fire is an essential tool for human survival and the use of fire
Fire_making
Electrical equipment in places where fire or explosion hazards may exist
the autoignition temperature of the hazardous atmosphere. Both external and internal temperatures are taken into consideration. The autoignition temperature
Electrical equipment in hazardous areas
Electrical_equipment_in_hazardous_areas
Type of aviation fuel
volatility to improve its carburetion characteristics and high autoignition temperature to prevent preignition in high compression aircraft engines. Turbine
Jet_fuel
Rapid ignition of combustible material in an enclosed area
majority of the exposed surfaces in a space are heated to their autoignition temperature and emit flammable gases (see also flash point). A small flame
Flashover
Terpene hydrocarbon
monoterpene and can be distilled without decomposition, although at elevated temperatures it cracks to form isoprene. It oxidizes easily in moist air to produce
Limonene
Chemical compound
unstable and tends to explode. When placed in vacuum, it has an autoignition temperature of 270 °C instead. With a melting point of 12.8 °C, the chemical
Nitroglycerin
Pyrophoric liquid
β-hydroxyketones. Triethylborane is strongly pyrophoric, with an autoignition temperature of −20 °C (−4 °F), burning with an apple-green flame characteristic
Triethylborane
Chemical compound
explosive with a detonation velocity of about 7,300 m s−1 and a autoignition temperature of 205 °C. The cyanuric triazide molecule exists as a planar triskelion
Cyanuric_triazide
Flammable substances added to aid engine combustion
internal combustion engines because of its low 160 °C (320 °F) autoignition temperature. Diethyl ether is distinct from petroleum ether (a crude oil distillate
Starting_fluid
2004 documentary film by Michael Moore
between the autoignition temperature of paper and the date of the September 11 attacks; one of the film's taglines was "The Temperature at Which Freedom
Fahrenheit_9/11
Chemical element with atomic number 1 (H)
from 4%–74% and with chlorine at 5%–95%. The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). In
Hydrogen
Minimum energy required for a chemical reaction
Activation energy asymptotics Chemical kinetics Mean kinetic temperature Autoignition temperature Quantum tunnelling "Activation Energy". www.chem.fsu.edu
Activation_energy
1953 dystopian novel by Ray Bradbury
was the autoignition temperature of paper. In various studies, scientists have placed the autoignition temperature at a range of temperatures between
Fahrenheit_451
Chemical compound
(T) and dangerous for the environment (N). The gas is flammable (autoignition temperature: 651 °C) and can form explosive mixtures with air (16–25%). The
Ammonia
Weapons delivery platform project undertaken by the United States in the 1950s
elements were designed for average operation temperature of 2,330 °F (1,277 °C); the autoignition temperature of the reactor base plates was only 150 °C
Supersonic Low Altitude Missile
Supersonic_Low_Altitude_Missile
Rapid or explosive burning of superheated gasses in a fire
near-simultaneous ignition of material caused by heat attaining the autoignition temperature of the combustible material and gases in an enclosure. Flashovers
Backdraft
Burning point of oils and fats
point Combustion Drying oil Flash point Fire point Kindling point (Autoignition temperature) American Oil Chemists' Society (2011). "AOCS Official Method Cc
Smoke_point
Liquid distilled from pine resin
NFPA 704 (fire diamond) 1 3 0 Flash point 35 °C (95 °F; 308 K) Autoignition temperature 220 °C (428 °F; 493 K) Except where otherwise noted, data are given
Turpentine
Chemical compound
combust more completely. Therefore, 2-methylhexane has a lower Autoignition temperature and flash point when compared to heptane. Theoretically 2-methylhexane
2-Methylhexane
Refrigerant fluid
Liquid heat capacity @ 1 atm, 30 °C, (kJ/(kg·°C)) 1.8 Flash point should not be mixed with air or oxygen under pressure Autoignition temperature 648 °C
R-410A
Thermoplastic polymer
combustible. The flash point of a typical composition is 260 °C; autoignition temperature is 388 °C. Gahleitner, Markus; Paulik, Christian (2014). "Polypropylene"
Polypropylene
Type of combustion caused by a self-perpetuating increase in internal temperatures
heating which rapidly accelerates to high temperatures) and finally, autoignition. It is distinct from (but has similar practical effects to) pyrophoricity
Spontaneous_combustion
Natural wax produced by honey bees of the genus Apis
2018-11-19. Retrieved 2010-03-12.. No reported autoignition temperature has been reported "At What Temperature Does Beeswax Melt?". Biology Insights. Retrieved
Beeswax
Comparison of a wide range of temperatures
Most ordinary human activity takes place at temperatures of this order of magnitude. Circumstances where water naturally occurs in liquid form are shaded
Orders of magnitude (temperature)
Orders_of_magnitude_(temperature)
Liquid state of the element hydrogen
There are two spin isomers of hydrogen. Room temperature hydrogen is 75% orthohydrogen. At cryogenic temperature it converts exothermically to parahydrogen
Liquid_hydrogen
Substance dissolving a solute resulting in a solution
exceptionally low autoignition temperatures which increase greatly the fire risk associated with these solvents. The autoignition temperature of carbon disulfide
Solvent
Chemical compound
NFPA 704 (fire diamond) 1 2 0 Flash point 45 °C (113 °F; 318 K) Autoignition temperature 333 °C (631 °F; 606 K) Explosive limits 1.5% - 7% Except where
Propylene glycol methyl ether acetate
Propylene_glycol_methyl_ether_acetate
Form of natural gas for easier storage and transport
in design. Methane, the main component of natural gas, has an autoignition temperature of 580 °C (1,076 °F), whereas gasoline and diesel autoignite at
Liquefied_natural_gas
Pyrophoric alloy whose primary components are cerium and iron
effect is dependent on the brittleness of the alloy and its low autoignition temperature. In Auer von Welsbach's first alloy, 30% iron (ferrum) was added
Ferrocerium
Chemical compound
Edgar; Reinking, Klaus; Schubert, Frank; Jünger, Oliver. "Polymers, High‐Temperature". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH
N-Methyl-2-pyrrolidone
Chemical compound
P370+P378, P402+P404, P405, P501 NFPA 704 (fire diamond) 2 2 2 W Autoignition temperature 360 °C (680 °F; 633 K) Related compounds Other anions Sodium borohydride
Sodium_triacetoxyborohydride
Plant fiber from the genus Gossypium
210 °C (410 °F) Autoignition temperature: 360–425 °C (680–797 °F) Autoignition temperature (for oily cotton): 120 °C (248 °F) A temperature range of 25 to
Cotton
Explosive mixture of hydrogen and oxygen gases
when brought to its autoignition temperature. For the stoichiometric mixture in air, at normal atmospheric pressure, autoignition occurs at about 570 °C
Oxyhydrogen
Chemical compound
formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure. It was first prepared in 1893 by the German chemist Johannes
Cyclopentane
Chemical compound
Viscosity 2.02 cP at 25 °C Hazards Flash point 77 °C (171 °F; 350 K) Autoignition temperature 385 °C (725 °F; 658 K) Safety data sheet (SDS) JT Baker MSDS Except
Tetralin
Chemical compound
high temperatures to drive off the carbon monoxide. This method has not changed since its invention in 1892: CaO + 3 C → CaC2 + CO The high temperature required
Calcium_carbide
Chemical compound
ostreatus). Benzaldehyde is easily oxidized to benzoic acid in air at room temperature, causing a common impurity in laboratory samples. Since the boiling point
Benzaldehyde
Chemical compound
Occupational safety and health (OHS/OSH): Main hazards irritant to skin Autoignition temperature does not ignite Except where otherwise noted, data are given for
Sodium_chloroacetate
Chemical compound
NFPA 704 (fire diamond) 1 1 0 Flash point 121 °C (250 °F; 394 K) Autoignition temperature 310 °C (590 °F; 583 K) Safety data sheet (SDS) SIRI.org Related
Dipropylene_glycol
Chemical compound
704 (fire diamond) 3 4 2 W Flash point −27 °C (−17 °F; 246 K) Autoignition temperature 185 °C (365 °F; 458 K) Explosive limits 1.2–90.5% Safety data sheet
Trichlorosilane
Organosilicon compound with the formula (CH3)3SiCl
704 (fire diamond) 3 3 2 W Flash point −28 °C (−18 °F; 245 K) Autoignition temperature 400 °C (752 °F; 673 K) Related compounds Related halosilanes Trimethylsilyl
Trimethylsilyl_chloride
High explosive used in bang snaps
hazards Sensitive high explosive NFPA 704 (fire diamond) 3 3 4 Autoignition temperature 170 °C (338 °F; 443 K) Except where otherwise noted, data are given
Silver_fulminate
Chemical compound
It has a refractive index of 1.363 with a wavelength of 589 nm at a temperature of 20 °C. Methyl isocyanate is usually manufactured by the reaction of
Methyl_isocyanate
Chemical compound
Pictograms Signal word Warning Flash point 305.5 °C (581.9 °F; 578.6 K) Autoignition temperature 485.1 °C (905.2 °F; 758.2 K) Safety data sheet (SDS) [1] Except
Nylon_66
Lowest temperature at which a fuel will burn continuously
critical. Testing of the fire point is done by open cup apparatus. Autoignition temperature Flash point Steven A., Treese; Peter R., Pujado; David S. J., Jones
Fire_point
Organic chemical compound
up when ether is being poured from one vessel into another. The autoignition temperature of diethyl ether is 160 °C (320 °F). The diffusion of diethyl ether
Diethyl_ether
Chemical compound
NFPA 704 (fire diamond) 1 1 1 Flash point 132 °C (270 °F; 405 K) Autoignition temperature 455 °C (851 °F; 728 K) Safety data sheet (SDS) MSDS by SMC Global
Propylene_carbonate
Chemical compound
a vehicle. Tests conducted in 2008 indicated that ignition requires temperatures exceeding 900 °C (1,650 °F) and mixture with PAG oil. Once in flame,
2,3,3,3-Tetrafluoropropene
Chemical compound
NFPA 704 (fire diamond) 3 2 1 Flash point 71 °C (160 °F; 344 K) Autoignition temperature 300 °C (572 °F; 573 K) Explosive limits 7.0% (low), 73% (high)
Paraformaldehyde
Chemical compound
P501 NFPA 704 (fire diamond) 2 0 0 Flash point Non-flammable Autoignition temperature Non-flammable Lethal dose or concentration (LD, LC): LD50 (median
Pyridinium_chloride
Chemical compound CH3(CH2)2CHO
NFPA 704 (fire diamond) 3 3 0 Flash point −7 °C (19 °F; 266 K) Autoignition temperature 230 °C (446 °F; 503 K) Explosive limits 1.9–12.5% Lethal dose or
Butyraldehyde
Organic chemical compound
(248 °F). Production of acrylamide in the heating process was shown to be temperature-dependent. It was not found in food that had been boiled, or in foods
Acrylamide
Chemical compound
(fire diamond) 2 2 0 Flash point 79.444 °C (174.999 °F; 352.594 K) Autoignition temperature 400 °C (752 °F; 673 K) Safety data sheet (SDS) sciencelab.com Related
1,3-Propanediol
Organic compound (C4H9CHO)
NFPA 704 (fire diamond) 3 3 0 Flash point 12 °C (54 °F; 285 K) Autoignition temperature 220 °C (428 °F; 493 K) Lethal dose or concentration (LD, LC): LD50
Pentanal
Chemical compound
CO2 unless properly buffered. Dimethyl carbonate can freeze at same temperatures as water, it can be thawed out with no loss of properties to itself or
Dimethyl_carbonate
Organic compound (CH3COCl)
NFPA 704 (fire diamond) 3 3 2 W Flash point 4 °C (39 °F; 277 K) Autoignition temperature 390 °C (734 °F; 663 K) Explosive limits 7.3–19% Related compounds
Acetyl_chloride
Poisonous gas consisting of carbon and oxygen
it is formed in high temperature in presence of oxygen-carrying ore, or a carboniferous agent such as coke, and high temperature. The blast furnace process
Carbon_monoxide
Chemical compound
fulminate can begin at temperatures as low as 100 °C (212 °F), though it proceeds at a much higher rate with increasing temperature. It may be decomposed
Mercury(II)_fulminate
Aviation accident involving fire
and the temperature rises, the autoignition temperature is eventually reached, causing everything in the enclosed space to ignite. Temperatures of flashovers
In-flight_fire
Chemical compound
NFPA 704 (fire diamond) 2 3 2 Flash point −8 °C (18 °F; 265 K) Autoignition temperature 427 °C (801 °F; 700 K) Explosive limits 2.6–13.40% NIOSH (US health
Vinyl_acetate
Chemical compound
becomes supersaturated. This solution is capable of cooling to room temperature without forming crystals. By pressing on a metal disc within the heating
Sodium_acetate
Chemical compound
Stability / Shelf Life: Stable under recommended storage conditions. Autoignition Temperature: 415 °C Decomposition: When heated to decomposition it emits acrid
Tert-Amyl_methyl_ether
Chemical compound
NFPA 704 (fire diamond) 2 2 0 Flash point 63 °C (145 °F; 336 K) Autoignition temperature 490 °C (914 °F; 763 K) Explosive limits 1.8–11.5% Lethal dose or
Dimethylacetamide
Chemical compound (C6H14)
trend is not apparent. Hexane has considerable vapor pressure at room temperature: Like most alkanes, hexanes typically exhibit low reactivity and are
Hexane
Chemical compound
NFPA 704 (fire diamond) 3 1 0 Flash point −23 °C (−9 °F; 250 K) Autoignition temperature 511 °C (952 °F; 784 K) Explosive limits 6.75–11.25% Lethal dose
Bromoethane
Vehicle powered by natural gas
Retrieved 17 April 2015. Autoignition temperature Engine knocking#Pre-ignition "Fuels and Chemicals - Autoignition Temperatures". Retrieved 17 April 2015
Natural_gas_vehicle
Chemical compound
NFPA 704 (fire diamond) 4 3 2 Flash point −8 °C; 17 °F; 265 K Autoignition temperature 196 °C (385 °F; 469 K) Explosive limits 2.5–92% Lethal dose or
Monomethylhydrazine
Mixture of alkanes from oil
tetrachloride. The naphtha mixtures that are distilled at a lower boiling temperature have a higher volatility and, generally speaking, a higher degree of
Petroleum_ether
Type of explosion
that compresses the unburnt gas ahead of the wave to a temperature above the autoignition temperature. In technical terms, the reaction zone (chemical combustion)
Deflagration to detonation transition
Deflagration_to_detonation_transition
Chemical compound
P501 NFPA 704 (fire diamond) 2 0 0 Flash point Non-flammable Autoignition temperature Non-flammable Except where otherwise noted, data are given for
2,4,6-Tribromoaniline
Organic compound with formula (CH3CO)2O
NFPA 704 (fire diamond) 3 2 1 W Flash point 49 °C (120 °F; 322 K) Autoignition temperature 316 °C (601 °F; 589 K) Explosive limits 2.7–10.3% Lethal dose or
Acetic_anhydride
Organic compound (H–CHO); simplest aldehyde
in most solvents. It slowly releases monomeric formaldehyde at room temperature. Methanediol, with the formula CH2(OH)2. This compound also exists in
Formaldehyde
Chemical compound
P301+P316, P331, P405, P501 Flash point 136 °C (277 °F; 409 K) Autoignition temperature 202 °C (396 °F; 475 K) Related compounds Related alkanes Pentadecane
Hexadecane
Chemical compound
NFPA 704 (fire diamond) 3 1 0 Flash point 126 °C (259 °F; 399 K) Autoignition temperature 470 °C (878 °F; 743 K) Lethal dose or concentration (LD, LC): LD50
Chloroacetic_acid
Chemical compound
NFPA 704 (fire diamond) 2 1 2 Flash point 170 °C (338 °F; 443 K) Autoignition temperature 400 °C (752 °F; 673 K) Explosive limits 2.4%-? Lethal dose or concentration
Benzotriazole
Chemical Compound
(OHS/OSH): Main hazards Harmful, Corrosive Flash point Non-flammable Autoignition temperature Non-flammable Except where otherwise noted, data are given for
Sodium_phenoxide
Simplest secondary alcohol
its slightly bitter taste. Isopropyl alcohol becomes viscous at lower temperatures, freezing at −89.5 °C, and has significant ultraviolet-visible absorbance
Isopropyl_alcohol
Chemical compound
P301+P317, P330, P391, P501 Flash point 148 °C (298 °F; 421 K) Autoignition temperature 480 °C (896 °F; 753 K) Related compounds Related compounds Phenyl
Benzyl_benzoate
Chemical compound
P403+P233, P403+P235, P405, P501 Flash point 35 °C; 95 °F; 308 K Autoignition temperature 238 °C; 460 °F; 511 K Except where otherwise noted, data are given
Ethylcyclohexane
Chemical compound
P391, P403+P233, P405, P501 Flash point 124 °C (255 °F; 397 K) Autoignition temperature 628 °C (1,162 °F; 901 K) Except where otherwise noted, data are
3-Aminopyridine
Chemical compound
P210, P261, P273, P301+P310, P331 Flash point 7 °C (45 °F; 280 K) Autoignition temperature 425 °C (797 °F; 698 K) Related compounds Related alkanes 2,2-Dimethylbutane
3,3-Dimethylhexane
Chemical compound
solution temperature: below around 49 °C (lower critical solution temperature), the liquids are completely miscible. The same is true for temperatures above
2-Butoxyethanol
Common food preservative
NFPA 704 (fire diamond) 2 1 0 Flash point 100 °C (212 °F; 373 K) Autoignition temperature 500 °C (932 °F; 773 K) Lethal dose or concentration (LD, LC): LD50
Sodium_benzoate
Chemical compound
Refractive index (nD) 1.512 Hazards Flash point 95 °C (203 °F; 368 K) Autoignition temperature 685 °C (1,265 °F; 958 K) Except where otherwise noted, data are
N-Vinylpyrrolidone
Chemical compound
prepared industrially by the reaction of 1,4-butanediol and ammonia at a temperature of 165–200 °C and a pressure of 17–21 MPa in the presence of a cobalt-
Pyrrolidine
Chemical compound
is produced by catalytic reaction of methanol and ammonia at elevated temperatures and high pressure: 2 CH3OH + NH3 → (CH3)2NH + 2 H2O Dimethylamine is
Dimethylamine
Chemical compound
to 265 mPa·s Hazards Flash point 221 °C (430 °F; 494 K) (c.c.) Autoignition temperature 380 °C (716 °F; 653 K) Except where otherwise noted, data are given
Diisononyl_phthalate
Chemical compound
NFPA 704 (fire diamond) 2 2 0 Flash point 12 °C (54 °F; 285 K) Autoignition temperature 440 °C (824 °F; 713 K) Explosive limits 1.9-11 % Safety data sheet
Ethyl_propionate
Chemical compound
form α-hydroxy-sulfinates at room temperature or to reduce the aldehyde to the corresponding alcohol above a temperature of 85 °C. Some ketones are also
Sodium_dithionite
Isomer/derivative of butane
NFPA 704 (fire diamond) 1 4 0 Flash point −83 °C (−117 °F; 190 K) Autoignition temperature 460 °C (860 °F; 733 K) Explosive limits 1.4–8.3% NIOSH (US health
Isobutane
Device producing a high-temperature explosion
contained long enough for the fuel to be heated well above its autoignition temperature so that once the container bursts, the superheated fuel autoignites
Thermobaric_weapon
Poisonous and flammable gas
higher temperatures, then cooled, the critical temperature reaches 203 K (−70 °C), which was the highest accepted superconducting critical temperature until
Hydrogen_sulfide
Cyclic chemical compound, (CH2)4O
water-miscible and can form solid clathrate hydrate structures with water at low temperatures. THF has been explored as a miscible co-solvent in aqueous solution to
Tetrahydrofuran
Chemical compound
flash point is −38 °C (−36 °F) or −49 °C (−56 °F). Its self-ignition temperature is 205 °C (401 °F). It is an eye and skin irritant and is harmful if
Dimethyl_sulfide
Chemical compound
704 (fire diamond) 1 2 0 Flash point 26 °C; 78 °F; 299 K c.c. Autoignition temperature 463 °C (865 °F; 736 K) Lethal dose or concentration (LD, LC): LD50
Ethyl_butyrate
Chemical compound
safety and health (OHS/OSH): Main hazards None Flash point None Autoignition temperature None Except where otherwise noted, data are given for materials
Perfluoromethylcyclohexane
Chemical compound
R. (2012). "Dissociation Constants of Protonated Amines in Water at Temperatures from 293.15 K to 343.15 K". Journal of Solution Chemistry. 41: 130. doi:10
Triethanolamine
Type of firearm propellant
decomposed. Carbon differs from ordinary charcoal. Whereas charcoal's autoignition temperature is relatively low, carbon's is much greater. Thus, a gunpowder
Gunpowder
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
Boy/Male
Muslim/Islamic
Rich Wealthy, Chief
Female
English
Feminine form of English Uriel, URIELA means "flame of God" or "light of the Lord."
Boy/Male
Indian
Zaman - times
Girl/Female
Hindu
Daughter, Goddess Durga, Great achiever, Happiness, Lord Shivas son, Young Man
Female
English
Pet form of English Jill, JILLIE means "descended from Jupiter (Jove)."
Girl/Female
Tamil
Veneration, Goddess chamundi
Girl/Female
Indian
Pious
Girl/Female
Arabic, Hindu, Indian, Muslim, Sanskrit, Tamil
Bright; Passionate; Touchstone
Boy/Male
Tamil
Harsh
Boy/Male
Indian, Sanskrit
Belonging to Sun; Sacred; Glorious
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
AUTOIGNITION TEMPERATURE
n.
An instrument for indicating changes of temperature without indicating the degree of heat by which it is affected; especially, an instrument contrived by Count Rumford which, as modified by Professor Leslie, was afterward called the differential thermometer.
n.
The estimation of temperature by the use of a thermometric apparatus.
n.
Freedom from passion; moderation.
n.
An instrument for measuring temperature, founded on the principle that changes of temperature in bodies are accompained by proportional changes in their volumes or dimensions.
n.
An elementary substance found as an oxide in the mineral cassiterite, and reduced as a soft white crystalline metal, malleable at ordinary temperatures, but brittle when heated. It is not easily oxidized in the air, and is used chiefly to coat iron to protect it from rusting, in the form of tin foil with mercury to form the reflective surface of mirrors, and in solder, bronze, speculum metal, and other alloys. Its compounds are designated as stannous, or stannic. Symbol Sn (Stannum). Atomic weight 117.4.
v. t.
Condition with regard to heat or cold; temperature.
v. t.
State with regard to heat or cold; temperature.
n.
An instrument for recording graphically the variations of temperature, or the indications of a thermometer.
n.
Constitution; state; degree of any quality.
n.
A self-acting apparatus for regulating temperature by the unequal expansion of different metals, liquids, or gases by heat, as in opening or closing the damper of a stove, or the like, as the heat becomes greater or less than is desired.
n.
Condition with respect to heat or cold, especially as indicated by the sensation produced, or by the thermometer or pyrometer; degree of heat or cold; as, the temperature of the air; high temperature; low temperature; temperature of freezing or of boiling.
n.
An apparatus for determining the temperature of a distant point, as by a thermoelectric circuit or otherwise.
a.
Having always the same form, manner, or degree; not varying or variable; unchanging; consistent; equable; homogenous; as, the dress of the Asiatics has been uniform from early ages; the temperature is uniform; a stratum of uniform clay.
n.
A process of increasing the strength of wrought iron by heating it to a determinate temperature, and giving to it, while in that state, a mechanical strain or tension in the direction in which the strength is afterward to be exerted.
n.
A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum.
a.
Situated beyond, or outside of, the tropics; extratropical; also, having an excessively tropical temperature; warmer than the tropics.
a.
Pertaining to, or connected with, the regulation of temperature in the animal body; as, the thermotaxic nervous system.
n.
Mixture; compound.
n.
The unit of electro-motive force; -- defined by the International Electrical Congress in 1893 and by United States Statute as, that electro-motive force which steadily applied to a conductor whose resistance is one ohm will produce a current of one ampere. It is practically equivalent to / the electro-motive force of a standard Clark's cell at a temperature of 15¡ C.
n.
An instrument for automatically recording indications of the variation of temperature.