plural noun Num·mu·lit·i·dae \ˌnəmyəˈlitəˌdē\

Definition of Nummulitidae

  1. :  a family of foraminifers that are mostly extinct, have a calcareous symmetrical usually lenticular or discoidal shell composed of numerous chambers spirally or concentrically arranged, and form whole strata in some Eocene and Oligocene deposits of eastern and southern Asia and the Mediterranean region from their shelly remains

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Origin and Etymology of nummulitidae

New Latin, from Nummulites, type genus + -idae

Seen and Heard

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to cast off or become cast off

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