plural noun Dip·la·can·thi·dae \ˌdipləˈkan(t)thəˌdē\

Definition of Diplacanthidae

  1. :  a family of primitive placoderm fishes (subclass Acanthodii) having two dorsal fins — see diplacanthus

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Origin and Etymology of diplacanthidae

New Latin, from Diplacanthus, type genus + -idae

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to criticize severely

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