procoelian

from The Century Dictionary.

• Hollowed or cupped in front, as the centrum or body of a vertebra: correlated with amphicœlian, opisthocœlian, and heterocœlian.
• Having procœlian vertebrœ, as a crocodile; belonging to the Procœlia.
• Hollowed by a ventricle, as the prosencephalon; of or pertaining to the procœliœ of the brain.
• noun A member of the suborder Procœlia.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Anat & Zoöl.) Concave in front.
• noun (Zoöl.) A reptile having procœlian vertebræ; one of the Procœlia.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun zoology Any of the Procoelia, a division of Crocodilia.