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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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History and Etymology for Archelon

New Latin, probably irregular from archi- + Greek chelōnē tortoise; akin to Greek chelys tortoise

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