(Pi"cra) n. [L., fr. Gr. sharp, bitter.] (Med.) The powder of aloes with canella, formerly officinal, employed as a cathartic.

(Pi"crate) n. (Chem.) A salt of picric acid.

(Pi"cric) a. (Chem.) Pertaining to, or designating, a strong organic acid intensely bitter.

Picric acid is obtained by treating phenol with strong nitric acid, as a brilliant yellow crystalline substance, C6H2(NO2)3.OH. It is used in dyeing silk and wool, and also in the manufacture of explosives, as it is very unstable when heated. Called also trinitrophenol, and formerly carbazotic acid.

(Pic"rite) n. [From Gr. bitter.] (Min.) A dark green igneous rock, consisting largely of chrysolite, with hornblende, augite, biotite, etc.

(Pic"ro*lite) n. [Gr. bitter + -lite.: cf. F. picrolithe.] (Min.) A fibrous variety of serpentine.

(Pic"ro*mel) n. [Gr. bitter + honey: cf. F. picromel.] (Old Chem.) A colorless viscous substance having a bitter-sweet taste.

It was formerly supposed to be the essential principle of the bile, but is now known to be a mixture, principally of salts of glycocholic and taurocholic acids.

(Pic`ro*tox"in) n. [Gr. bitter + toxic + -in.] (Chem.) A bitter white crystalline substance found in the cocculus indicus. It is a peculiar poisonous neurotic and intoxicant, and consists of a mixture of several neutral substances.

(Pi"cryl) n. [Picric + - yl.] (Chem.) The hypothetical radical of picric acid, analogous to phenyl.

(Pict"ish) a. Of or pertaining to Picts; resembling the Picts. "The Pictish peer." Byron.

(Pic"to*graph) n. [See Picture, and -graph.] A picture or hieroglyph representing and expressing an idea.Pic`to*graph"ic a.

(Pic*to"ri*al) a. [L. pictorius, fr. pictor a painter, fr. pingere to paint. See Paint.] Of or pertaining to pictures; illustrated by pictures; forming pictures; representing with the clearness of a picture; as, a pictorial dictionary; a pictorial imagination. "Pictorial rhetoric." Ruskin.Pic*to"ri*al*ly, adv.

(Pic*tor"ic Pic*tor"ic*al) a. Pictorial. [Obs.]

(Picts) n. pl.; sing. Pict [L. Picti; cf. AS. Peohtas.] (Ethnol.) A race of people of uncertain origin, who inhabited Scotland in early times.

(||Pic*tu"ra) n. [L., a painting.] (Zoöl.) Pattern of coloration.

(Pic"tur*a*ble) a. Capable of being pictured, or represented by a picture.

(Pic"tur*al) a. Pictorial. [R.] Sir W. Scott.

(Pic"tur*al), n. A picture. [Obs.] Spenser.

(Pic"ture) n. [L. pictura, fr. pingere, pictum, to paint: cf. F. peinture. See Paint.]

1. The art of painting; representation by painting. [Obs.]

Any well-expressed image . . . either in picture or sculpture.
Sir H. Wotton.

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