\Pro*c[oe]"li*an\, a. [See {Proc[oe]le}.] (Anat &
Zo["o]l.)
Concave in front; as, proc[oe]lian vertebr[ae], which have
the anterior end of the centra concave and the posterior
convex.

\Pro*c[oe]"li*an\, n. (Zo["o]l.)
A reptile having proc[oe]lian vertebr[ae]; one of the
Proc[oe]lia.