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ear bone, 1660s, from Latin incus "anvil," from incudere "to forge with a hammer." So called by Belgian anatomist Andreas Vesalius (1514-1564).
incus in·cus (ĭng'kəs)
n. pl. in·cu·des (ĭng-kyōō'dēz)
The middle of the three ossicles in the middle ear, located between the malleus and the stapes and composed of a body and two limbs. Also called anvil.