A ridge or hardened skin that forms on parts of the body, usually from repeated friction or pressure.
From Latin 'callum' or 'callosus,' meaning 'hard' or 'thick-skinned.' The word entered English in the 15th century and refers to protective tissue.
Calluses are your body's way of building armor against the world—they're a visible record of what your hands or feet repeatedly do, whether you're a guitar player, dancer, or laborer.
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