| n. | 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. |
| 2. | (Zool.) One of the hard lateral pieces of the mastax of Rotifera. See Mastax. | |
| 3. | (Zool.) A genus of bivalve shells; the hammer shell. |
| Noun | 1. | malleus - the ossicle attached to the eardrumSynonyms: hammer |