| 释义 |
umbo
um·bo U0015200 (ŭm′bō)n. pl. um·bo·nes (ŭm-bō′nēz) or um·bos 1. The boss or knob at the center of a shield.2. a. Biology A knoblike protuberance arising from a surface, as the prominence near the hinge of a bivalve shell or the raised area in the center of the cap of a mushroom.b. Anatomy A small projection at the center of the outer surface of the eardrum.
[Latin umbō, umbōn-; see nobh- in Indo-European roots.]
um′bo·nal (ŭm′bə-nəl, ŭm-bō′nəl) adj.umbo (ˈʌmbəʊ) n, pl umbones (ʌmˈbəʊniːz) or umbos1. (Botany) a small hump projecting from the centre of the cap in certain mushrooms2. (Zoology) a hooked prominence occurring at the apex of each half of the shell of a bivalve mollusc3. (Anatomy) anatomy the slightly convex area at the centre of the outer surface of the eardrum, where the malleus is attached on the internal surface4. (Arms & Armour (excluding Firearms)) a large projecting central boss on a shield, esp on a Saxon shield[C18: from Latin: boss of a shield, projecting piece] umbonate, umbonal, umbonic adjum•bo (ˈʌm boʊ)
n., pl. um•bo•nes (ʌmˈboʊ niz) um•bos. 1. a boss on a shield. 2. any similar boss or protuberance. 3. the beak of a bivalve shell; the protuberance of each valve above the hinge. 4. the raised area on the inner surface of the tympanic membrane, where the malleus is attached. [1715–25; < Latin umbō; akin to umbilīcus (see umbilicus)] um′bo•nal (-bə nl) adj. um′bo•nate (-nɪt, -ˌneɪt) adj. Thesaurus| Noun | 1. |  umbo - a slight rounded elevation where the malleus attaches to the eardrumeardrum, myringa, tympanic membrane, tympanum - the membrane in the ear that vibrates to soundconvex shape, convexity - a shape that curves or bulges outward |
Umbo
umbo[′əm·bō] (anatomy) A rounded elevation of the surface of the tympanic membrane. (invertebrate zoology) A prominence above the hinge of a bivalve mollusk shell. Umbo the iron central boss of a shield, which protected the warrior’s hand. Under the hemispherical or conical umbo was a crosspiece by which the shield was held. Shields with umbones were widely used in ancient Greece and Rome and in medieval Europe and Rus’. umbo
umbo [um´bo] (L.) 1. a rounded elevation.2. the slight projection at the center of the outer surface of the tympanic membrane.um·bo, gen. um·bo·nis, pl. um·bo·nes (ŭm'bō, -bō-nis, -bō-nēs), 1. A projecting point of a surface. 2. Umbo of tympanic membrane. [L. boss of a shield, a knob] umbo (ŭm′bō)n. pl. umbos or umbones (ŭm-bō′nēz) A small anatomical projection on a surface, such as that on the inner surface of the eardrum at the end of the manubrium of the malleus, corresponding to the most elevated point of the eardrum.
um′bo·nal (ŭm′bə-nəl, ŭm-bō′nəl), um·bon′ic (ŭm-bŏn′ĭk) adj.um·bo, pl. umbones (ŭm'bō, -nēz) [TA] 1. A projecting point of a surface. 2. [TA]
Synonym(s): umbo of tympanic membrane. [L. boss of a shield, a knob]umbo the pointed centre of a clam shell, being the oldest part around which are many concentric lines of growth.umbo An area (0.15 mm-0.20 mm) in the centre of the foveola. Stimulation of this area results in the highest visual acuity.umboenUS
Related to umbo: gumbo, Umbo of tympanic membrane, UmbroWords related to umbonoun a slight rounded elevation where the malleus attaches to the eardrumRelated Words- eardrum
- myringa
- tympanic membrane
- tympanum
- convex shape
- convexity
|