Cystidea
Pronunciation : Cys*tid"e*a (ss-td"-)
Part of Speech : n.
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.
pl.
Source : Webster's Unabridged Dictionary, 1913