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-saur

American  
  1. a combining form used in the names of extinct reptiles, especially archosaurs, usually Anglicized forms of Latin taxonomic names.

    dinosaur; pterosaur.


-saur British  

combining form

  1. lizard

    dinosaur

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of -saur

From the Greek word saûros lizard