Proterosaurus
Pro`te`ro`sau´rus
n. | 1. | (Paleon.) An extinct genus of reptiles of the Permian period. Called also Protosaurus. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
n. | 1. | (Paleon.) An extinct genus of reptiles of the Permian period. Called also Protosaurus. |