Webster’s Revised Unabridged Dictionary · 1913
Trichiasis
Tri·chi′a·sis (trĭ·kī′ȧ·sĭs), n. [NL., fr. Gr. τριχίασις, fr. τρίξ, τριχός, hair.] (Med.) A disease of the eye, in which the eyelashes, being turned in upon the eyeball, produce constant irritation by the motion of the lids.