plural noun
Rhy·​aco·​phil·​i·​dae | \ (ˌ)rīˌakəˈfiləˌdē, ˌrīəkōˈf-\

Definition of Rhyacophilidae 

: a large and widely distributed family of caddis flies

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History and Etymology for Rhyacophilidae

New Latin, from Rhyacophila, type genus (from Greek rhyak-, rhyax stream + New Latin -phila) + -idae

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