(Ab"ack) n. An abacus. [Obs.] B. Jonson.
(Ab*ac"ti*nal) a. [L. ab + E. actinal.] (Zoöl.) Pertaining to the surface or end opposite to the
mouth in a radiate animal; opposed to actinal. "The aboral or abactinal area." L. Agassiz.
(Ab*ac"tion) n. Stealing cattle on a large scale. [Obs.]
(Ab*ac"tor) n. [L., fr. abigere to drive away; ab + agere to drive.] (Law) One who steals and
drives away cattle or beasts by herds or droves. [Obs.]
(||A*bac"u*lus) n.; pl. Abaculi [L., dim. of abacus.] (Arch.) A small tile of glass, marble, or
other substance, of various colors, used in making ornamental patterns in mosaic pavements. Fairholt.
(Ab"a*cus) n.; E. pl. Abacuses ; L. pl. Abaci [L. abacus, abax, Gr. 'a`bax]
1. A table or tray strewn with sand, anciently used for drawing, calculating, etc. [Obs.]
2. A calculating table or frame; an instrument for performing arithmetical calculations by balls sliding
on wires, or counters in grooves, the lowest line representing units, the second line, tens, etc. It is still
employed in China.
3. (Arch.) (a) The uppermost member or division of the capital of a column, immediately under the
architrave. See Column. (b) A tablet, panel, or compartment in ornamented or mosaic work.
4. A board, tray, or table, divided into perforated compartments, for holding cups, bottles, or the like; a
kind of cupboard, buffet, or sideboard.
Abacus harmonicus (Mus.), an ancient diagram showing the structure and disposition of the keys of
an instrument. Crabb.
(Ab"a*da) n. [Pg., the female rhinoceros.] The rhinoceros. [Obs.] Purchas.
(A*bad"don) n. [Heb. abaddon destruction, abyss, fr. abad to be lost, to perish.]
1. The destroyer, or angel of the bottomless pit; the same as Apollyon and Asmodeus.
2. Hell; the bottomless pit. [Poetic]
In all her gates, Abaddon rues
Thy bold attempt.
(A*baft") prep. [Pref. a- on + OE. baft, baften, biaften, AS. beæftan; be by + æftan behind. See
After, Aft, By.] (Naut.) Behind; toward the stern from; as, abaft the wheelhouse.