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Added 9 October 2026

callus

/ˈkæləs/ noun

In Latin: callum Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about callus at Wordnik → Where our words come from →

An area of skin that is thick or hard from continual pressure or friction (as the sole of the foot).
Bony tissue formed during the healing of a fractured bone.
(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid.

verb

Cause a callus to form on.
The long march had callused his feet
Form a callus or calluses.
His foot callused

Origin

Borrowed from Latin callum (“hard skin”). Displaced Old English wearr.

From Wiktionary, via Kaikki.org (CC BY-SA)

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