plural noun
Pas·​sal·​i·​dae | \ pəˈsaləˌdē\

Definition of Passalidae

: a family of rather large usually black lamellicorn beetles chiefly of tropical countries that live and feed in decaying wood and are sometimes placed in the family Lucanidae — see bess-bug, passalus

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History and Etymology for Passalidae

New Latin, from Passalus, type genus + -idae

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to shake or wave menacingly

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