opisthocoelian
O*pis`tho*coe"li*an, O*pis`tho*coe"lous, a. Etym: [Gr. (Anat.) Defn: Concave behind; -- applied especially to vertebræ in which the anterior end of the centrum is convex and the posterior concave.
O*pis`tho*coe"li*an, O*pis`tho*coe"lous, a. Etym: [Gr. (Anat.) Defn: Concave behind; -- applied especially to vertebræ in which the anterior end of the centrum is convex and the posterior concave.