[krahy-noid, krin-oid]
  1. 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.
  1. belonging or pertaining to the Crinoidea.
  2. lilylike.

Origin of crinoid

1825–35; < Greek krinoeidḗs, equivalent to krín(on) lily + -oeidēs -oid
Related formscri·noi·dal, adjectivenon·cri·noid, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for crinoid

Historical Examples of crinoid

British Dictionary definitions for crinoid


  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
  1. of, relating to, or belonging to the Crinoidea
  2. shaped like a lily
Derived Formscrinoidal, adjective

Word Origin for crinoid

C19: from Greek krinoeidēs lily-like
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for crinoid

1836, Latinized from Greek krinoeides "lily-like," from krinon "lily" (a foreign word of unknown origin) + -oeides "like" (see -oid).

Online Etymology Dictionary, © 2010 Douglas Harper

crinoid in Science


  1. 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.