malleus

mal·le·us

noun \ˈmal-ē-əs\

plural mal·lei \-ē-ˌī, -ē-ˌē\

Definition of MALLEUS

: the outermost of the chain of three ossicles in the middle ear of a mammal consisting of a head, neck, short process, long process, and handle with the short process and handle being fastened to the tympanic membrane and the head articulating with the head of the incus—called also hammer

Illustration of MALLEUS