plural noun
Pol·​y·​noi·​dae | \ ˌpäləˈnȯi(ˌ)dē, pəˌlinəˈwī(ˌ)dē\

Definition of Polynoidae

: a family of marine polychaete worms having the back covered with two rows of scales

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History and Etymology for Polynoidae

New Latin, from Polynoe, type genus (from Greek Polynoē, a sea nymph) + -idae

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