Umbones
Umbo Um"bo, n.; pl. L. {Umbones}, E. {Umbos}. [L.] 1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. [1913 Webster]

2. A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larv[ae] of echinoderms or in the tympanic membrane of the ear. [1913 Webster]

3. (Zo["o]l.) One of the lateral prominence just above the hinge of a bivalve shell. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • umbones — pl. of umbo …   Useful english dictionary

  • umbones — um·bo·nes (əm boґnēz) [L.] plural of umbo …   Medical dictionary

  • umbones — n. bump or elevation on a shield; rounded bump or protuberance; depressed area on the surface of the eardrum (Anatomy); protrusion on either side of the hinge of a bivalve shell (Zoology) …   English contemporary dictionary

  • umbone — {{hw}}{{umbone}}{{/hw}}s. m. Parte centrale anteriore dello scudo, rilevata come una borchia, spesso con una punta detta brocco …   Enciclopedia di italiano

  • primordial valve — Chitinous plate in Cirripedia (Lepadomorpha and Verrucomorpha) having a distinctive honeycomb appearance, developing at incipient umbones of terga, scuta and carina, during metamorphosis [Moore and McCormick, 1969]. One of 5 chitinous plates… …   Crustacea glossary

  • UMBO — ex Graeco ἄμβων, Aeol. ὄμβων, idem cum Umbilico, quae vox indidem orat. Hinc, quos in cylindris, qui non nullis ex beryllis fiebant, umbilicos Plinius, l. 37. c. 5. Solinus umbones, appellat, duo nempe utrinque capita, quae tales aurô… …   Hofmann J. Lexicon universale

  • Nates — Na tes, n. pl. [L., the buttocks.] 1. (Anat.) (a) The buttocks. (b) The two anterior of the four lobes on the dorsal side of the midbrain of most mammals; the anterior optic lobes. [1913 Webster] 2. (Zo[ o]l.) The umbones of a bivalve shell.… …   The Collaborative International Dictionary of English

  • Umbo — Um bo, n.; pl. L. {Umbones}, E. {Umbos}. [L.] 1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. [1913 Webster] 2. A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or …   The Collaborative International Dictionary of English

  • Umbos — Umbo Um bo, n.; pl. L. {Umbones}, E. {Umbos}. [L.] 1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. [1913 Webster] 2. A boss, or rounded elevation, or a corresponding depression, in a palate,… …   The Collaborative International Dictionary of English

  • umbo — noun (plural umbones or umbos) Etymology: Latin; akin to Latin umbilicus more at navel Date: 1721 1. the boss of a shield 2. a rounded elevation: as a. an inward projection of the tympanic membrane of the ear b. one of the lateral prominences… …   New Collegiate Dictionary

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