Associations to the word «Umbo»

UMBO, noun. (biology) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvæ of echinoderms or in the tympanic membrane of the ear.

UMBO, noun. (zoology) One of the lateral prominence just above the hinge of a bivalve shell.

UMBO, noun. (mycology) A bump or protrusion on the top of the cap.

UMBO, noun. (historical) The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.

UMBO, noun. A slight rounded elevation where the malleus attaches to the eardrum.