Cystidea

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Cystidea \Cys*tid"e*a\ (s?s-t?d"?-?), n. pl. [NL., fr. Gr. ????
     a bladder, pouch.] (Zool.)
     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.
     [1913 Webster]