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单词 umbonal
释义

WordReference Random House Unabridged Dictionary of American English © 2024
um•bo•nal  (umbə nl),USA pronunciation adj. 
  1. having the shape or appearance of an umbo; bosslike:an umbonal structure.
  2. of, pertaining to, or near the umbo:the umbonal region.
Also, um•bon•ic (um bonik).USA pronunciation 
  • Latin umbōn- (stem of umbō; see umbo) + -al1
  • 1850–55

WordReference Random House Unabridged Dictionary of American English © 2024
um•bo  (umbō),USA pronunciation n., pl. um•bo•nes (um bōnēz),USA pronunciation um•bos. 
  1. Heraldrya boss on a shield, as one at the center of a circular shield.
  2. any similar boss or protuberance.
  3. Zoologythe beak of a bivalve shell;
    the protuberance of each valve above the hinge.
  4. Anatomythe depressed area on the outer surface of the tympanic membrane.
  5. Botanya blunt or rounded protuberance arising from a surface, as on a pine cone scale.
  • Latin umbō boss (of a shield), knob, projecting part; akin to umbilīcus (see umbilicus)
  • 1715–25

Collins Concise English Dictionary © HarperCollins Publishers::
umbo /ˈʌmbəʊ/ n ( pl umbones /ʌmˈbəʊniːz/, umbos)
  1. a small hump projecting from the centre of the cap in certain mushrooms
  2. a hooked prominence occurring at the apex of each half of the shell of a bivalve mollusc
  3. a large projecting central boss on a shield, esp on a Saxon shield
Etymology: 18th Century: from Latin: boss of a shield, projecting piece

umbonate /ˈʌmbənɪt -ˌneɪt/, umbonal /ˈʌmbənəl/, umbonic /ʌmˈbɒnɪk/ adj
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