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Archelon
noun
Ar·che·lon
\ˈärkəˌlän\
Definition of Archelon
: a genus of very large extinct marine turtles from the Cretaceous of South Dakota having a well-developed plastron but poorly developed carapace
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Origin and Etymology of archelon
New Latin, probably irregular from archi- + Greek chelōnē tortoise; akin to Greek chelys tortoise
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