callus.
A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.
Meaning & usage
A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.
The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece.
The new formation over the end of a cutting, before it puts out rootlets.
In orchids, a fleshy outgrowth from the labellum.
In grasses, a hardened extension from the base of a floret, which may or may not elongate and is often covered in hairs or bristles.
A shining area on the frons of many species of Tabanomorpha (horse flies and relatives).
Where this word comes from
Borrowed from Latin callum (“hard skin”). Displaced Old English wearr.
To form such hardened tissue.
Where this word comes from
Borrowed from Latin callum (“hard skin”). Displaced Old English wearr.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.