Encyclopedia > Callus

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A callus is a small area of skin, usually on the foot, that has become thick and hard from rubbing or pressure. Calluses may lead to other problems such as serious infection. Shoes that fit well can keep calluses from forming.

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British coinage

... as inflation made them irrelevant: 1 penny = 2 halfpennies and (earlier) 4 farthings. As the symbol, £, for the pound is derived from the Latin pound, the libra, ...