amphicelous

or am·phi·coe·lous

[ am-fuh-see-luh s ]
/ ˌæm fəˈsi ləs /

adjective Anatomy, Zoology.

concave on both sides, as the bodies of the vertebrae of fishes.

Origin of amphicelous

First recorded in 1865–70, amphicelous is from the Greek word amphíkoilos hollow at both ends. See amphi-, -cele2, -ous
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British Dictionary definitions for amphicoelous

amphicoelous

/ (ˌæmfɪˈsiːləs) /

adjective

(of the vertebrae of most fishes and some amphibians) concave at the anterior and posterior ends

Word Origin for amphicoelous

C19: from amphi- + Greek koilos hollow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012