Archegosaurus
noun
Ar·che·go·sau·rus
\ärˌkēgōˈsȯrəs\
Definition of Archegosaurus
: a genus of extinct long-snouted aquatic labyrinthodont amphibians from the Lower Permian of Europe
From the M-W Editors
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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
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