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umbo

umbo (pl. umbones) A convex protuberance or swelling in the centre. In Brachiopoda and Bivalvia, 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.

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umbo

umbo (pl. umbones) The first part of a brachiopod (Brachiopoda) or bivalve (Bivalvia) shell to be formed. In a brachiopod, the umbo is the posterior part of each valve; in a bivalve it forms the dorsal part of the shell.

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"umbo." A Dictionary of Earth Sciences. . Encyclopedia.com. 21 Apr. 2018 <http://www.encyclopedia.com>.

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umbo

umbo (um-boh) n. a projecting centre of a round surface, especially the projection of the inner surface of the eardrum to which the malleus is attached.

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umbo

umbo A convex protuberance or swelling in the centre, as in the pileus of certain fungal fruit bodies.

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umbo

umbo boss of a shield; round or conical projection. XVIII. — L. umbō (see NAVEL).

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"umbo." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 21 Apr. 2018 <http://www.encyclopedia.com>.

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umbo

umbojabot, sabot •ambo, flambeau, mambo, Rambo, Rimbaud, Tambo •Gabo, Garbo, lavabo •elbow • Strabo • rainbow •gazebo, grebo, placebo •Igbo • bilbo •akimbo, bimbo, limbo •Maracaibo • yobbo •combo, Negombo •longbow • crossbow • oxbow •hobo, lobo, oboe •Colombo, dumbo, gumbo, jumbo, mumbo-jumbo, umbo •Malabo • Mirabeau • turbo

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