TRICHIASIS

(Lat.), n. f. Tri2k(tri2ch2)-i2-a(a3)'si2s. Gen., -as'eos (-is). Gr., rpixiWis (from flpi'f, a hair). Fr., t. Ger., T. It., trichiasi. Sp., tri qui as is. 1. See TRICHOSIS. 2. That condition of the eyelids in which, owing to long-continued marginal blepharitis or to chronic trachoma, some of the eyelashes are inverted and rub over and irritate the eyeball. It is frequently complicated by spasm of the orbicularis muscle. T. pa es into entropion by imperceptible degrees. [F.] 3. Of Hippo crates, a voiding of hair with the urine. 4. An absce of the mamma. fL, 50 (o, 14).] T. carunculae. The development of long, stout hairs in the caruncle of the inner canthus of the eye. [F.] T. of the anus. Inversion of the hairs which grow about the anus. [D.] [s. 644]