Atrabilious
(At`ra*bil"ious) a. Melancholic or hypochondriac; atrabiliary. Dunglision.
A hard-faced, atrabilious, earnest-eyed race.
Lowell.
He was constitutionally atrabilious and scornful.
Froude.
Atramentaceous
(At`ra*men*ta"ceous) a. [L. atramentum ink, fr. ater black.] Black, like ink; inky; atramental.
[Obs.] Derham.
Atramental
(At`ra*men"tal At`ra*men"tous) a. Of or pertaining to ink; inky; black, like ink; as, atramental
galls; atramentous spots.
Atramentarious
(At`ra*men*ta"ri*ous) a. [Cf. F. atramentaire. See Atramentaceous.] Like ink; suitable
for making ink. Sulphate of iron (copperas, green vitriol) is called atramentarious, as being used in
making ink.
Atrede
(At*rede) v. t. [OE. at (AS. æt) out + rede.] To surpass in council. [Obs.]
Men may the olde atrenne, but hat atrede.
Chaucer.
Atrenne
(At*renne") v. t. [OE. at + renne to run.] To outrun. [Obs.] Chaucer.
Atresia
(||A*tre"si*a) n. [NL., fr. Gr. not perforated.] (Med.) Absence or closure of a natural passage
or channel of the body; imperforation.
Atrial
(A"tri*al), a. Of or pertaining to an atrium.
Atrip
(A*trip") adv. [Pref. a- + trip.] (Naut.) (a) Just hove clear of the ground; — said of the anchor.
(b) Sheeted home, hoisted taut up and ready for trimming; — said of sails. (c) Hoisted up and ready to
be swayed across; — said of yards.
Atrium
(||A"tri*um) n.; pl. Atria [L., the fore court of a Roman house.]
1. (Arch.) (a) A square hall lighted from above, into which rooms open at one or more levels. (b) An
open court with a porch or gallery around three or more sides; especially at the entrance of a basilica or
other church. The name was extended in the Middle Ages to the open churchyard or cemetery.
2. (Anat.) The main part of either auricle of the heart as distinct from the auricular appendix. Also, the
whole articular portion of the heart.
3. (Zoöl.) A cavity in ascidians into which the intestine and generative ducts open, and which also receives
the water from the gills. See Ascidioidea.
Atrocha
(||At`ro*cha) n. [NL., fr. Gr. 'a priv. + a circle.] (Zoöl.) A kind of chætopod larva in which no
circles of cilia are developed.
Atrocious
(A*tro"cious) a. [L. atrox, atrocis, cruel, fierce: cf. F. atroce.]
