An area of abnormally hard or thickened tissue; spec. an area of skin with a thickened horny layer (stratum corneum), typically resulting from…

Hardened or thickened tissue; an instance of this; (in later use) spec. an area of skin with a thickened horny layer (stratum corneum), typically…

A callosity.

Hardened or thickened skin, the result of continued friction; also figurative. Latin callum.

= callus, n. (in various senses).

An area of abnormally hardened or thickened tissue; a callus. Also figurative. Cf. callosity, n. 1a. Obsolete.

(See quot. 1825.)

transferred. Hard or callous skin on the hands (cf. horny-handed adj.). dialect.

Pathology. Callosity.