noun Ar·che·go·sau·rus \ärˌkēgōˈsȯrəs\

Definition of Archegosaurus

  1. :  a genus of extinct long-snouted aquatic labyrinthodont amphibians from the Lower Permian of Europe

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of archegosaurus

New Latin, from Greek archēgos primary, originating (from archē beginning + -ēgos, akin to Greek agein to lead, drive) + New Latin -saurus — more at archi-, agent

Seen and Heard

What made you want to look up Archegosaurus? Please tell us where you read or heard it (including the quote, if possible).


to cast off or become cast off

Get Word of the Day daily email!