Athenian A·the"ni·an adjective [ Confer French Athénien .] Of or pertaining to Athens, the metropolis of Greece. -- noun A native or citizen of Athens.

Atheological A`the·o·log"ic·al adjective Opposed to theology; atheistic. Bp. Montagu.

Atheology A`the·ol"o·gy noun [ Prefix a- not + theology .] Antagonism to theology. Swift.

Atheous A"the·ous adjective [ Greek ... without God. See Atheist .] 1. Atheistic; impious. [ Obsolete] Milton.

2. Without God, neither accepting nor denying him.

I should say science was atheous , and therefore could not be atheistic.
Bp. of Carlisle.

Atherine Ath"er·ine noun [ New Latin atherina , from Greek ... a kind of smelt.] (Zoology) A small marine fish of the family Atherinidæ , having a silvery stripe along the sides. The European species ( Atherina presbyter ) is used as food. The American species ( Menidia notata ) is called silversides and sand smelt . See Silversides .

Athermancy A·ther"man·cy (ȧ*thẽr"măn*sȳ) noun [ See Athermanous .] Inability to transmit radiant heat; impermeability to heat. Tyndall.

Athermanous A·ther"ma·nous adjective [ Greek 'a priv. + qermai`nein to heat, qe`rma heat: confer French athermane .] (Chemistry) Not transmitting heat; -- opposed to diathermanous .

Athermous A·ther"mous adjective (Chemistry) Athermanous.

Atheroid Ath"er·oid adjective [ Greek ..., ..., a beard, or an ear, of grain + -oid .] Shaped like an ear of grain.

Atheroma Ath`e·ro"ma noun [ Latin , from Greek ..., ..., from ... gr...ats, meal.] (Medicine) (a) An encysted tumor containing curdy matter. (b) A disease characterized by thickening and fatty degeneration of the inner coat of the arteries.

Atheromatous Ath`e·rom"a·tous adjective (Medicine) Of, pertaining to, or having the nature of, atheroma. Wiseman.

Athetize Ath"e·tize transitive verb [ imperfect & past participle Athetized ; present participle & verbal noun Athetizing .] [ Greek ..., from ... set aside, not fixed; ... not + ... to place.] To set aside or reject as spurious, as by marking with an obelus.

Athetosis Ath`e·to"sis noun [ New Latin , from Greek ... not fixed; 'a priv. + ... to set.] (Medicine) A variety of chorea, marked by peculiar tremors of the fingers and toes.

Athink A·think" transitive verb To repent; to displease; to disgust. [ Obsolete] Chaucer.

Athirst A·thirst" adjective [ Middle English ofthurst , Anglo-Saxon ofpyrsted , past participle of ofpyrstan ; prefix of- , intensive + pyrstan to thirst. See Thirst .] 1. Wanting drink; thirsty.

2. Having a keen appetite or desire; eager; longing. " Athirst for battle." Cowper.

Athlete Ath"lete noun [ Latin athleta , Greek ... prizefighter, from ... to contend for a prize, ..., Hom. ..., contest, ... prize; from the same root as English wed : confer French athlète .] 1. (Antiq.) One who contended for a prize in the public games of ancient Greece or Rome.

2. Any one trained to contend in exercises requiring great physical agility and strength; one who has great activity and strength; a champion.

3. One fitted for, or skilled in, intellectual contests; as, athletes of debate.

Athletic Ath`let"ic adjective [ Latin athleticus , Greek .... See Athlete .] 1. Of or pertaining to athletes or to the exercises practiced by them; as, athletic games or sports.

2. Befitting an athlete; strong; muscular; robust; vigorous; as, athletic Celts. " Athletic soundness." South. -- Ath*let"ic*al*ly adverb

Athleticism Ath·let"i·cism noun The practice of engaging in athletic games; athletism.

Athletics Ath·let"ics noun The art of training by athletic exercises; the games and sports of athletes.

Athletism Ath"le·tism noun The state or practice of an athlete; the characteristics of an athlete.

Athrepsia A·threp"si·a noun [ New Latin , from Greek ... priv. + ... nourishment.] (Medicine) Profound debility of children due to lack of food and to unhygienic surroundings. -- A*threp"tic adjective

Athwart A·thwart" preposition [ Prefix a- + thwart .] 1. Across; from side to side of.

Athwart the thicket lone.
Tennyson.

2. (Nautical) Across the direction or course of; as, a fleet standing athwart our course.

Athwart hawse , across the stem of another vessel, whether in contact or at a small distance. -- Athwart ships , across the ship from side to side, or in that direction; -- opposed to fore and aft .

Athwart A·thwart" adverb 1. Across, especially in an oblique direction; sidewise; obliquely.

Sometimes athwart , sometimes he strook him straight.
Spenser.

2. Across the course; so as to thwart; perversely.

All athwart there came
A post from Wales loaden with heavy news.
Shak.

Atilt A·tilt" adverb [ Prefix a- + tilt .] 1. In the manner of a tilter; in the position, or with the action, of one making a thrust. "To run atilt at men." Hudibras.

2. In the position of a cask tilted, or with one end raised. [ In this sense sometimes used as an adjective.]

Abroach, atilt , and run
Even to the lees of honor.
Beau. & Fl.

Atimy At"i·my noun [ Greek ...; 'a priv. + ... honor.] (Gr. Antiq.) Public disgrace or stigma; infamy; loss of civil rights. Mitford.

Atlanta At·lan"ta noun [ New Latin , from Greek ....] (Zoology) A genus of small glassy heteropod mollusks found swimming at the surface in mid ocean. See Heteropod .

Atlantal At·lan"tal adjective (Anat.) (a) Relating to the atlas. (b) Anterior; cephalic. Barclay.

Atlantean At`lan·te"an adjective [ Latin Atlant...us .] 1. Of or pertaining to the isle Atlantis, which the ancients allege was sunk, and overwhelmed by the ocean.

2. Pertaining to, or resembling, Atlas; strong.

With Atlantean shoulders, fit to bear
The weight of mightiest monarchies.
Milton.

Atlantes At·lan"tes noun plural [ Latin , from Greek ..., plural of .... See Atlas .] (Architecture) Figures or half figures of men, used as columns to support an entablature; -- called also telamones . See Caryatides . Oxf. Gloss.

Atlantic At·lan"tic adjective [ Latin Atlanticus , from Atlas . See Atlas and Atlantes .] 1. Of or pertaining to Mt. Atlas in Libya, and hence applied to the ocean which lies between Europe and Africa on the east and America on the west; as, the Atlantic Ocean (called also the Atlantic ); the Atlantic basin; the Atlantic telegraph.

2. Of or pertaining to the isle of Atlantis.

3. Descended from Atlas.

The seven Atlantic sisters.
Milton.

Atlantides At·lan"ti·des noun plural [ Latin See Atlantes .] The Pleiades or seven stars, fabled to have been the daughters of Atlas.

Atlas At"las noun ; plural Atlases [ Latin Atlas , - antis , Greek ..., ..., one of the older family of gods, who bears up the pillars of heaven; also Mt. Atlas , in W. Africa, regarded as the pillar of heaven. It is from the root of ... to bear. See Tolerate .] 1. One who sustains a great burden.

2. (Anat.) The first vertebra of the neck, articulating immediately with the skull, thus sustaining the globe of the head, whence the name.

3. A collection of maps in a volume ; -- supposed to be so called from a picture of Atlas supporting the world, prefixed to some collections. This name is said to have been first used by Mercator, the celebrated geographer, in the 16th century.

4. A volume of plates illustrating any subject.

5. A work in which subjects are exhibited in a tabular from or arrangement; as, an historical atlas .

6. A large, square folio, resembling a volume of maps; -- called also atlas folio .

7. A drawing paper of large size. See under Paper , noun

Atlas powder , a nitroglycerin blasting compound of pasty consistency and great explosive power.

Atlas At"las noun [ Arabic , smooth.] A rich kind of satin manufactured in India. Brande & C.

Atlas powder At"las pow"der A blasting powder or dynamite composed of nitroglycerin, wood fiber, sodium nitrate, and magnesium carbonate.

Atman At"man noun [ Sanskrit ātman .] (Hinduism) (a) The life principle, soul, or individual essence. (b) The universal ego from whom all individual atmans arise. This sense is a European excrescence on the East Indian thought.

Atmiatry At·mi"a·try noun [ Greek ... vapor + ... medical treatment, healing.] Treatment of disease by vapors or gases, as by inhalation.

Atmidometer At`mi·dom"e·ter noun [ Greek ..., ..., smoke, vapor + -meter ; confer French atmidomètre .] An instrument for measuring the evaporation from water, ice, or snow. Brande & C.

Atmo At"mo noun [ Contr. from atmosphere .] (Physics) The standard atmospheric pressure used in certain physical measurements calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0° Centigrade, at the level of the sea, and in the latitude of Paris. Sir W. Thomson.

Atmologic, Atmological At`mo·log"ic, At`mo·log"ic·al adjective Of or pertaining to atmology. " Atmological laws of heat." Whewell.

Atmologist At·mol"o·gist noun One who is versed in atmology.

Atmology At·mol"o·gy noun [ Greek ... vapor + - logy .] (Physics) That branch of science which treats of the laws and phenomena of aqueous vapor. Whewell.

Atmolysis At·mol"y·sis noun [ Greek ... vapor + ... a loosing, ... to loose.] (Chemistry) The act or process of separating mingled gases of unequal diffusibility by transmission through porous substances.

Atmolyzation At`mol·y·za"tion noun (Chemistry) Separation by atmolysis.

Atmolyze At"mo·lyze transitive verb (Chemistry) To subject to atmolysis; to separate by atmolysis.

Atmolyzer At"mo·ly`zer noun (Chemistry) An apparatus for effecting atmolysis.

Atmometer At·mom"e·ter noun [ Greek ... smoke, vapor + -meter : confer French atmomètre .] An instrument for measuring the rate of evaporation from a moist surface; an evaporometer. Huxley.

Atmosphere At"mos·phere noun [ Greek ... vapor (akin to Sanskrit ātman breath, soul, German athem breath) + ... sphere: confer French atmosphère . See Sphere .] 1. (Physics) (a) The whole mass of aëriform fluid surrounding the earth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars. (b) Any gaseous envelope or medium.

An atmosphere of cold oxygen.
Miller.

2. A supposed medium around various bodies; as, electrical atmosphere , a medium formerly supposed to surround electrical bodies. Franklin.

3. The pressure or weight of the air at the sea level, on a unit of surface, or about 14.7 Ibs. to the sq. inch.

Hydrogen was liquefied under a pressure of 650 atmospheres .
Lubbock.

4. Any surrounding or pervading influence or condition.

The chillest of social atmospheres .
Hawthorne.

5. The portion of air in any locality, or affected by a special physical or sanitary condition; as, the atmosphere of the room; a moist or noxious atmosphere .

Atmospheric, Atmospherical At`mos·pher"ic, At`mos·pher"ic·al adjective [ Confer French atmosphérique .] 1. Of or pertaining to the atmosphere; of the nature of, or resembling, the atmosphere; as, atmospheric air; the atmospheric envelope of the earth.

2. Existing in the atmosphere.

The lower atmospheric current.
Darwin.

3. Caused, or operated on, by the atmosphere; as, an atmospheric effect; an atmospheric engine.

4. Dependent on the atmosphere. [ R.]

In am so atmospherical a creature.
Pope.

Atmospheric engine , a steam engine whose piston descends by the pressure of the atmosphere, when the steam which raised it is condensed within the cylinder. Tomlinson. -- Atmospheric line (Steam Engin.) , the equilibrium line of an indicator card. Steam is expanded "down to the atmosphere" when its pressure is equal to that of the atmosphere. (See Indicator card .) -- Atmospheric pressure , the pressure exerted by the atmosphere, not merely downwards, but in every direction. In amounts to about 14.7 Ibs. on each square inch. -- Atmospheric railway , one in which pneumatic power, obtained from compressed air or the creation of a vacuum, is the propelling force. -- Atmospheric tides . See under Tide .

Atmospherically At`mos·pher"ic·al·ly adverb In relation to the atmosphere.

Atmospherology At`mos·phe·rol"o·gy noun [ Atmosphere + -logy .] The science or a treatise on the atmosphere.

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