'Cyatholith' definitions:

Definition of 'Cyatholith'

From: GCIDE

Cyatholith \Cy*ath"olith\ (s?-?th"?-l?th), n. [Gr. ky`aqos a cup + -lith.] (Biol.) A kind of coccolith, which in shape resembles a minute cup widened at the top, and varies in size from 1/6000 to 1/8000 of an inch. [1913 Webster]