Path. [Late L., a. Gr. τριχίᾱσις (Galen), f. τριχιᾶν to be hairy.] a. Introversion of the eye-lashes; also, growth of an extra row of eye-lashes beneath the normal ones. b. A disease in which small filamentous bodies are passed in the urine: = PILIMICTION. c. A disease of the breasts in suckling women, in which the nipples crack into fine fissures.
1661. Lovell, Hist. Anim. & Min., 340. The trichiasis, when haires grow under the natural, and prick the eye.
1693. trans. Blancard’s Phys. Dict. (ed. 2), Trichiasis,… hairy Urine, such as by reason of pituitous Humours Hairs seem to swim in.
1706. Phillips (ed. Kersey), Trichiasis, or Trichosis, a growing of much Hair: Also a fault in the Eyelids when there is a double row of Hairs.
1839–47. Todd’s Cycl. Anat., III. 82/2. One of the operations for trichiasis is to extirpate the roots of the eye-lashes.
1857. Dunglison, Med. Lex., Trichiasis.… This name has been given … 1. To a disease of the kidneys or bladder, in which filamentous substances, resembling hairs, are passed in the urine…. 2. To a painful swelling of the breasts, in child-bed women, when the milk is excreted with difficulty.
1878. T. Bryant, Pract. Surg., I. 312. The hair bulbs may become displaced, causing the eyelashes to be misdirected—‘trichiasis.’
