Malleus

‖n.; pl. Mallei [ L., hammer. See Mall a beetle. ] 1. (Anat.) The outermost of the three small auditory bones, ossicles; the hammer. It is attached to the tympanic membrane by a long process, the handle or manubrium. See Illust. of Far. [ 1913 Webster ]

2. (Zool.) One of the hard lateral pieces of the mastax of Rotifera. See Mastax. [ 1913 Webster ]

3. (Zool.) A genus of bivalve shells; the hammer shell. [ 1913 Webster ]