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Answer for the clue "A slight rounded elevation where the malleus attaches to the eardrum ", 4 letters:
umbo

Alternative clues for the word umbo

Word definitions for umbo in dictionaries

Wikipedia Word definitions in Wikipedia
The umbo (plural umbones or umbos ) is the vaguely defined, often most prominent, highest part of each valve of the shell of a bivalve or univalve mollusk . It usually contains the valve's beak , the oldest point of the valve, and its degree of prominence ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"boss of a shield," 1921, from Latin umbo "shield-boss, knob, projection."

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Umbo \Um"bo\, n.; pl. L. Umbones , E. Umbos . [L.] The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo ...

Usage examples of umbo.

The edges were obtuse, the caps fleshy, then corky, smooth, the upper ends not regular, oblique in the form of an umbo or little knob, the pellicles or outside layers thin and easily separated.