The Collaborative International Dictionary
Nummulites
Nummulites \Num`mu*li"tes\, n. [NL. See Nummulite.] (Paleon.) A genus of extinct Tertiary Foraminifera, having a thin, flat, round shell, containing a large number of small chambers arranged spirally.
Wiktionary
nummulites
n. (plural of nummulite English)