‖Ker′a‐to‐nyx″is (?), n. [Gr. κέρασ, -ατοσ, 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.