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Webster's 1913 Dictionary

CYSTIDEA

Cys *tid "e *a (ss-td "-), n. pl. Etym: [NL. , fr. Gr. (Zoöl.)

 

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.

 

CYSTIDEAN

CYSTIDEAN Cys *tid "e *an (-td "-an ), n. (Zoöl.)

 

Defn: One of the Cystidea.