WordReference Random House Unabridged Dictionary of American English © 2019
am•phi•ce•lous  (am′fə sēləs),USA pronunciation adj. [Anat., Zool.]
  1. Anatomy, Zoologyconcave on both sides, as the bodies of the vertebrae of fishes.
Also,  am′phi•coelous. 
  • Greek amphíkoilos hollow at both ends. See amphi-, -cele2, -ous
  • 1865–70

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