Akademik

Clavus
A small calloused area of skin caused by local pressure irritating tissue over a bony prominence. Also called a corn. A clavus most commonly occurs over a toe where it forms what is referred to as a hard corn. Between the toes, pressure can form a soft corn of macerated skin which often yellows. The word "clavus" is the Latin word for nail. The word corn comes from the Latin "cornu" meaning horn or hoof.
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1. A small conical callosity caused by pressure over a bony prominence, usually on a toe. SYN: corn. [L. a nail, wart, corn]

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cla·vus 'klā-vəs, 'kläv-əs n, pl cla·vi 'klā-.vī, 'kläv-.ē CORN

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n.
a sharp pain in the head, as if a nail were being driven in.

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cla·vus (klaґvəs) pl. claґvi [L. “nail”] corn (def. 1).

Medical dictionary. 2011.