The Collaborative International Dictionary
Keratonyxis
Keratonyxis \Ker`a*to*nyx"is\, n. [Gr. ke`ras, -atos, horn + ? puncture.] (Med.) The operation of removing a cataract by thrusting a needle through the cornea of the eye, and breaking up the opaque mass.
Wiktionary
keratonyxis
n. (context medicine archaic English) The operation of removing a cataract by thrusting a needle through the cornea of the eye and breaking up the opaque mass.