callus
(kalīәs)
localized hyperplasia of the horny layer of the epidermis due to pressure or friction.
an unorganized network of woven bone formed about the ends of a broken bone; it is absorbed as repair is completed (provisional
callus), and ultimately replaced by true bone (definitive callus).
sucking callus
one in the center of the upper lip of an infant, caused by friction during nursing.
a callus on a thumb or finger that a child sucks on excessively.
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