Definition of callus
(Entry 1 of 2)
1
: a thickening of or a hard thickened area on skin or bark
2
: a mass of exudate and connective tissue that forms around a break in a bone and is converted into bone in healing
3
: soft tissue that forms over a wounded or cut plant surface
callus
verb
callused; callusing; calluses
Definition of callus (Entry 2 of 2)
: to form callus
: to cause callus to form on
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Merriam-Webster unabridged
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Time Traveler for callus
The first known use of callus was in 1563
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