Cystidea
(n. pl.) 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.
Similar Words:
Acephalocystic Cholecystis Cystic Cysticerce Cysticercus Cysticule Cystid Cystidea Cystidean Cystine