Nummulite

from WordNet (r) 3.0 (2006)

nummulite
    n 1: large fossil protozoan of the Tertiary period

from The Collaborative International Dictionary of English v.0.48

Nummulite \Num"mu*lite\, n. [L. nummus a coin + -lite: cf. F.
   nummulite.] (Paleon.)
   A fossil of the genus {Nummulites} and allied genera.
   [1913 Webster]