n. [ Gr. &unr_; slackness; 'a priv. + &unr_; tone, strength, &unr_; to stretch: cf. F. atonie. ] (Med.) Want of tone; weakness of the system, or of any organ, especially of such as are contractile. [ 1913 Webster ]
‖n. [ Gr. ke`ras, -atos, horn + &unr_; puncture. ] (Med.) The operation of removing a cataract by thrusting a needle through the cornea of the eye, and breaking up the opaque mass. [ 1913 Webster ]