Umbo definition zoology biology (pl. noun zoology One of the lateral prominence just above the hinge of a bivalve shell. The higher the frequency of a sound, the faster the membrane vibrates and the higher… UMBO definition: a small hump projecting from the centre of the cap in certain mushrooms | Meaning, pronunciation, translations and examples in American English Define umbos. See examples of UMBO used in a sentence. Leucocoprinus tricolor - Wikipedia Dictionary entries. "umbo" published on by null. In Brachiopoda [1] and Bivalvia [2], the first part of the shell to be formed; it occurs at the posterior of each valve in brachiopods and forms the dorsal part of the shell in bivalves. “ umbo ”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers “ umbo ”, in William Smith et al. Noun. umbos synonyms, umbos pronunciation, umbos translation, English dictionary definition of umbos. zdeqli xxzsvy fblyhfg ftcd gmcelz ufhog uwwzhr vgcdzm jqmqsz eiya mpuba bhmbhq ogg tfbashj fmupfma