Proterosaurus definitions

Proterosaurus

• (n.) An extinct genus of reptiles of the Permian period. Called also Protosaurus.
Found on http://thinkexist.com/dictionary/meaning/proterosaurus/

---

Proterosaurus

Pro`te·ro·sau'rus noun [ New Latin , from Greek ... earlier (fr. ... before) + ... a lizard.] (Paleon.) An extinct genus of reptiles of the Permian period. Called also Protosaurus .
Found on http://www.encyclo.co.uk/webster/P/180

---