Opisthocoela

Opisthocoela

[ə‚pis·thə′sē·lə]
(vertebrate zoology)
A suborder of the order Anura; members have opisthocoelous trunk vertebrae, and the adults typically have free ribs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.