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Webster 1913 Edition
Cystidea
‖
Cys-tid′e-a
(s?s-t?d′?-?)
, Noun.
pl.
[NL., fr. Gr. [GREEK][GREEK][GREEK][GREEK] 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.