n. 硬皮, 老茧皮, 无情

[医] 胼胝

Callosity \Cal*los"i*ty\, n.; pl. {Callosities}. [L. callasitas;
cf. F. calost['e].]
A hard or thickened spot or protuberance; a hardening and
thickening of the skin or bark of a part, eps. as a result of
continued pressure or friction.
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