incus (n.)
middle ear bone, 1660s, from Latin incus "anvil," from incudere "to forge with a hammer," from in- "in" + cudere "to strike, beat," from PIE *kau-do-, suffixed form of root *kau- "to hew, strike" (see hew). The bone so called by Belgian anatomist Andreas Vesalius (1514-1564).