A-tiptoe adverb On tiptoe; eagerly expecting.

We all feel a-tiptoe with hope and confidence.
F. Harrison.

Atheize transitive verb To render atheistic or godless. [ R.]

They endeavored to atheize one another.
Berkeley.

Atheize intransitive verb To discourse, argue, or act as an atheist. [ R.] -- A"the*i`zer noun Cudworth.

Atheling (ăth"ĕl*ĭng) noun [ Anglo-Saxon æðeling noble, from æðele noble, akin to German adel nobility, edel noble. The word æðel , English ethel , is in many Anglo-Saxon proper names, as Ethel wolf, noble wolf; Ethel bald, noble bold; Ethel bert, noble bright.] An Anglo-Saxon prince or nobleman; esp., the heir apparent or a prince of the royal family. [ Written also Adeling and Ætheling .]

Atheneum, Athenæum noun ; plural English Atheneums Latin Athenæa [ Latin Athenaeum , Greek 'Aqhn`aion a temple of Minerva at Athens, from 'Aqhna^ , contr. from 'Aqhna`a , 'Aqhnai`a , in Homer 'Aqh`nh , 'Aqhnai`n , Athene (called Minerva by the Romans), the tutelary goddess of Athens.]
1. (Gr. Antiq.) A temple of Athene, at Athens, in which scholars and poets were accustomed to read their works and instruct students.

2. A school founded at Rome by Hadrian.

3. A literary or scientific association or club.

4. A building or an apartment where a library, periodicals, and newspapers are kept for use.

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

Atheological adjective Opposed to theology; atheistic. Bp. Montagu.

Atheology noun [ Prefix a- not + theology .] Antagonism to theology. Swift.

Atheous 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 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 (ȧ*thẽr"măn*sȳ) noun [ See Athermanous .] Inability to transmit radiant heat; impermeability to heat. Tyndall.

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

Athermous adjective (Chemistry) Athermanous.

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

Atheroma 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 adjective (Medicine) Of, pertaining to, or having the nature of, atheroma. Wiseman.

Athetize 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 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 transitive verb To repent; to displease; to disgust. [ Obsolete] Chaucer.

Athirst 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 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 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 noun The practice of engaging in athletic games; athletism.

Athletics noun The art of training by athletic exercises; the games and sports of athletes.

Athletism noun The state or practice of an athlete; the characteristics of an athlete.

Athrepsia 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 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 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 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 noun [ Greek ...; 'a priv. + ... honor.] (Gr. Antiq.) Public disgrace or stigma; infamy; loss of civil rights. Mitford.

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

Atlantal adjective (Anat.) (a) Relating to the atlas. (b) Anterior; cephalic. Barclay.

Atlantean 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 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 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 noun plural [ Latin See Atlantes .] The Pleiades or seven stars, fabled to have been the daughters of Atlas.

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

Atlas powder A blasting powder or dynamite composed of nitroglycerin, wood fiber, sodium nitrate, and magnesium carbonate.

Atman 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 noun [ Greek ... vapor + ... medical treatment, healing.] Treatment of disease by vapors or gases, as by inhalation.

Atmidometer noun [ Greek ..., ..., smoke, vapor + -meter ; confer French atmidomètre .] An instrument for measuring the evaporation from water, ice, or snow. Brande & C.

Atmo 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 adjective Of or pertaining to atmology. " Atmological laws of heat." Whewell.

Atmologist noun One who is versed in atmology.

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

Atmolysis 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 noun (Chemistry) Separation by atmolysis.

Atmolyze transitive verb (Chemistry) To subject to atmolysis; to separate by atmolysis.