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单词 sigmoid flexure
释义

WordReference Random House Unabridged Dictionary of American English © 2024
sigmoid flex′ure, 
    1. [Zool.]anS-shaped curve in a body part.
    2. Also called sigmoid co′lon. anS-shaped curve of the large intestine between the descending colon and the rectum. See diag. under intestine. 
    • 1780–90

Collins Concise English Dictionary © HarperCollins Publishers::
sigmoid flexure n
  1. an S-shaped curve, as in the necks of certain birds
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