plural noun
Icos·​te·​idae | \ˌīˌkäˈstēəˌdē\

Definition of Icosteidae 

: a family of deepwater fishes (order Malacichthyes) comprising the ragfishes and having a soft skeleton and skin loose and naked or with small prickles or scales

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History and Etymology for Icosteidae

New Latin, from Icosteus, type genus + -idae

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