Part 423

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

At"i*my (&?;), n. [Gr. &?;; 'a priv. + &?; honor.] (Gr. Antiq.) Public disgrace or stigma; infamy; loss of civil rights. Mitford.

-a"tion (&?;). [L. -ationem. See -tion.] A suffix forming nouns of action, and often equivalent to the verbal substantive in -ing. It sometimes has the further meanings of state, and that which results from the action. Many of these nouns have verbs in -ate; as, alliterate -ation, narrate -ation; many are derived through the French; as, alteration, visitation; and many are formed on verbs ending in the Greek formative -ize (Fr. -ise); as, civilization, demoralization.

A-tip"toe (&?;), adv. On tiptoe; eagerly expecting.

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

||At*lan"ta (&?;), n. [NL., fr. Gr. &?;.] (Zoöl.) A genus of small glassy heteropod mollusks found swimming at the surface in mid ocean. See Heteropod.

At*lan"tal (&?;), a. (Anat.) (a) Relating to the atlas. (b) Anterior; cephalic. Barclay.

At`lan*te"an (&?;), a. [L. 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.

||At*lan"tes (&?;), n. pl. [L., fr. Gr. &?;, pl. of &?;. See Atlas.] (Arch.) Figures or half figures of men, used as columns to support an entablature; -- called also telamones. See Caryatides. Oxf. Gloss.

At*lan"tic (&?;), a. [L. Atlanticus, fr. 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.

||At*lan"ti*des (&?;), n. pl. [L. See Atlantes.] The Pleiades or seven stars, fabled to have been the daughters of Atlas.

At"las (&?;), n.; pl. Atlases (&?;). [L. Atlas, -antis, Gr. &?;, &?;, 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, n.

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

At"las, n. [Ar., smooth.] A rich kind of satin manufactured in India. Brande & C.

At`mi*dom"e*ter (&?;), n. [Gr. &?;, &?;, smoke, vapor + -meter; cf. F. atmidomètre.] An instrument for measuring the evaporation from water, ice, or snow. Brande & C.

At"mo (&?;), n. [Contr. fr. 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.

{ At`mo*log"ic (&?;), At`mo*log"ic*al (&?;), } a. Of or pertaining to atmology. "Atmological laws of heat." Whewell.