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Definition of: Crinoidea
(krī·noi′dē·ə, kri-) noun plural Zool.
A class of echinoderms having jointed stems, attached by stalks to the sea bottom, and radial arms; the sea lilies. [NL <Gk. krinoeidēs <krinon lily + eidos form]
—cri·noi′·de·an noun & adjective
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