Top Definition
1. a dinosaur from the prehistoric era. commonly mistaken for the rhinocerous
when asked what a rhinosaurus was, mitra answered, "isn't it a dinosaur or something?"
by i think u know who wrote this January 06, 2009
1 more definition
mix between a rhino and dinosaur
im running through the hall like a rhinosaurus
by David...mash January 19, 2009

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