plural noun
Cri·​noi·​dea | \ krə̇ˈnȯidēə, -rīˈ- \

Definition of Crinoidea

: a large class of chiefly tropical or fossil echinoderms that have a more or less cup-shaped body provided with five or more feathery arms commonly bifurcated or many-branched and bearing pinnules, a mouth lying between the arms on the concave upper surface, and opposite the mouth usually a long jointed stalk fixed to the base of the body and having its opposite end divided into rhizoid processes that anchor the animal to the sea bottom — compare comatulid, sea lily

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Other Words from Crinoidea

crinoidean \ krə̇ˈnȯidēən , (ˈ)krī¦-​ \ adjective or noun

First Known Use of Crinoidea

1821, in the meaning defined above

History and Etymology for Crinoidea

New Latin, from Greek krinon lily + New Latin -oidea

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The first known use of Crinoidea was in 1821

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Cite this Entry

“Crinoidea.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2021.

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