plural noun
Ba·​lae·​ni·​dae | \ bəˈlēnəˌdē\

Definition of Balaenidae

: a family of whales comprising the right whales and extinct related forms

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First Known Use of Balaenidae

1869, in the meaning defined above

History and Etymology for Balaenidae

New Latin, from Balaena, type genus + -idae

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The first known use of Balaenidae was in 1869

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