Opisthocoelian
Pronunciation : O*pis`tho*coe"li*an, O*pis`tho*coe"lous
Part of Speech : a.
Etymology : [Gr. (Anat.)
Definition : Defn: Concave behind; -- applied especially to vertebr? in which the anterior end of the centrum is convex and the posterior concave.
Source : Webster's Unabridged Dictionary, 1913