Trial

(tri' -a I). The act of trying testing. T.-case, a box of lenses for testing and timating the refraction of the eye, containing biconcave, cylindric, prismatic, and other lenses, frame, a spectacle-frame into which the trial-lei may be slipped. T.-gla es or T.-lenses uated set of concave, convex, cylindric. and lenses used in testing vision. See Trepang (tre-pang/). The sea-slug, or bichoaotnar, Holothuria edulis; a worm-like sea animal highly prized in China as an ingredient of soups; regarded as analeptic. Unof. Trepanize (trep'-an-iz). To trepan. Trepanning (tre-pan' -ing). Boring; using the trephine. T. -elevator, a lever used to raise the piece of bone detached by the trepan. T.-jar, a jar in which mixed liquids are allowed stand in order that they may separate by gravity.