• (pl. ) of Callosity
Raised or mounded structures (see also calli); also specialised structures on Microtis labella that resemble clusters of sand grains.
Raised, thickened, and roughened patches of skin on the head of a right whale. Callosities are generally home to large colonies of whale lice. The number, size, and configuration of callosities differ between individuals, allowing scientists to tell animals apart from each other.
Localised hyperplasia of the horny layer of the epidermis due to pressure or friction. ... (12 Dec 1998) ... 
Fleshy wart-like growths from skin of some whales.