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单词 synsacrum
释义

WordReference Random House Unabridged Dictionary of American English © 2024
syn•sac•rum  (sin sak′rəm, -sā′krəm),USA pronunciation n., pl. -sac•ra (-sak′rə, -sā′krə).USA pronunciation [Ornith.]
  1. Birdsa dorsal ridge of bone in the pelvic region of birds, formed by the fusion of certain thoracic, lumbar, sacral, and caudal vertebrae.
  • syn- + sacrum 1900–05
syn•sa′cral, adj. 

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