[krahy-noid, krin-oid]
any echinoderm of the class Crinoidea, having a cup-shaped body to which are attached branched, radiating arms, comprising the sea lilies, feather stars, and various fossil forms.
belonging or pertaining to the Crinoidea.

1825–35; < Greek krinoeidḗs, equiv. to krín(on) lily + -oeidēs -oid

crinoidal, adjective
noncrinoid, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
crinoid (ˈkraɪnɔɪd, ˈkrɪn-)
1.  any primitive echinoderm of the class Crinoidea, having delicate feathery arms radiating from a central disc. The group includes the free-swimming feather stars, the sessile sea lilies, and many stemmed fossil forms
2.  of, relating to, or belonging to the Crinoidea
3.  shaped like a lily
[C19: from Greek krinoeidēs lily-like]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1836, from Gk. krinoeides "lily-like."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
crinoid   (krī'noid')  Pronunciation Key 
Any of various marine echinoderms of the class Crinoidea. Crinoids have a cup-shaped body with five or more feathery arms and sometimes a stalk for attachment to a surface. The arms contain reproductive organs and sensory tube feet. Crinoids were common during the Paleozoic Era and are important index fossils. Sea lilies and feather stars are types of crinoids.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


any marine invertebrate of the class Crinoidea (phylum Echinodermata) usually possessing a somewhat cup-shaped body and five or more feathery arms. The arms are edged with feathery projections (pinnules) that contain the reproductive organs and carry numerous tube feet with sensory functions. The tentacles also have open grooves, along which cilia (minute, hairlike projections) sweep food particles toward the mouth

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Small rugose corals and crinoid ossicles also occur.
Today, the only porous sediments are the crinoid and bryozoan sands at the outer edges of the mound.
Small amounts of shell fragments, carbonaceous streaked and crinoid stem fragments.
No fossils other than crinoid debris have been found in the lower part of the formation.
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