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Cetotheriidae

plural noun
Ce·​to·​the·​ri·​i·​dae | \ ˌsētəthəˈrīəˌdē\

Definition of Cetotheriidae

: a family of extinct whalebone whales

History and Etymology for Cetotheriidae

New Latin, from Cetotherium, type genus (from cet- + -therium) + -idae

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