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proterosaurus

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Proterosaurus

Pro`te*ro*sau"rus\, n. [NL., from Gr. ? earlier (fr. ? before) + ? a lizard.] (Paleon.) An extinct genus of reptiles of the Permian period. Called also Protosaurus.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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