Atoll, a-tol′, or at′ol, n. a coral island consisting of a circular belt of coral enclosing a central lagoon. [A Malay word.]
Atom, at′om, n. a particle of matter so small that it cannot be cut or divided, the unit of matter; anything very small.—adjs. Atom′ic, -al, pertaining to atoms.—ns. Atomic′ity; Atomisā′tion (med.) the reduction of liquids to the form of spray; At′omism, the doctrine that atoms arranged themselves into the universe: the atomic theory; At′omist, one who believes in atomism.—adj. Atomis′tic.—adv. Atomist′ically.—n. At′omy, an atom, or mote: (Shak.) a pygmy.—Atomic philosophy, a system of philosophy enunciated by Democritus, which taught that the ultimate constituents of all things are indivisible particles, differing in form and in their relations to each other; Atomic theory, the hypothesis that all chemical combinations take place between the ultimate particles of bodies, uniting each atom to atom, or in proportions expressed by some simple multiple of the number of atoms. [Gr. atomos—a, not, temnein, tamein, to cut. See Atom.]
Atomy, at′om-i, n. (Shak.) a skeleton, walking skeleton. [Formerly also atamy and natomy, for anatomy, mistakingly divided an atomy.]
Atone, at-ōn′, adv. (Spens.) at one, at once, together. [M.E. also attone, earlier atoon, aton, at one, at on.]
Atone, at-ōn′, v.i. to give satisfaction or make reparation (with for): to make up for deficiencies: (Shak.) to agree, be in accordance.—v.t. to appease, to expiate: (arch.) harmonise, or reconcile.—ns. Atone′ment, the act of atoning; reconciliation: expiation: reparation: esp. (theol.) the reconciliation of God and man by means of the incarnation and death of Christ; Aton′er.—adv. Aton′ingly. [See Atone, above.]
Atony, at′on-i, n. want of tone or energy: debility: relaxation.—adj. At′onic (pros.), without tone: unaccented. [Gr. atonia—a, neg., tonos, tone, strength. See Tone.]
Atop, a-top′, adv. on or at the top. [Prep. a, and Top.]
Atrabiliar, at-ra-bil′i-ar, adj. of a melancholy temperament: hypochondriac: splenetic, acrimonious.—Also Atrabil′iary, Atrabil′ious. [L. ater, atra, black, bilis, gall, bile. See Bile.]
Atramental, at-ra-men′tal, adj. (Sir T. Browne) inky, black. [From L. atramentum, ink—atra, black.]
Atremble, a-trem′bl, adv. trembling.