Nummulitidae
plural noun
Num·mu·lit·i·dae
ˌnəmyəˈlitəˌdē
: 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
Word History
Etymology
New Latin, from Nummulites, type genus + -idae