amphicoelous
adjective
am·phi·coe·lous
variants or less commonly amphicelous or amphycoelous
-¦sēləs
: biconcave —used of vertebrae (as those of certain reptiles) having both the anterior and posterior surfaces of the centrum concave
Word History
Etymology
Late Greek amphikoilos doubly concave, from Greek amphi- + koilos hollow
First Known Use
1866, in the meaning defined above