plural noun Ich·thy·or·nith·i·dae \-ˌȯrˈnithəˌdē\

Definition of Ichthyornithidae

  1. :  a family of extinct birds (order Ichthyornithiformes) from the Upper Cretaceous of North America that comprises the genus Ichthyornis and in some classifications Apatornis and possibly one other genus

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Origin and Etymology of ichthyornithidae

New Latin, from Ichthyornith-, Ichthyornis, type genus + -idae

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to criticize severely

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