Cyatholith
Pronunciation : Cy*ath"olith (s-th"-lth)
Part of Speech : n.
Etymology : [Gr. ky`aqos a cup + -lith.] (Biol.)
Definition : Defn: A kind of coccolith, which in shape resembles a minute cup widened at the top, and varies in size from
Source : Webster's Unabridged Dictionary, 1913