WordReference Random House Unabridged Dictionary of American English © 2017
cri•noid  (krīnoid, krinoid),USA pronunciation n. 
  1. Invertebratesany 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. Invertebratesbelonging or pertaining to the Crinoidea.
  2. lilylike.
cri•noidal, adj. 
  • Greek krinoeidé̄s, equivalent. to krín(on) lily + -oeidēs -oid
  • 1825–35

Collins Concise English Dictionary © HarperCollins Publishers::

crinoid /ˈkraɪnɔɪd ˈkrɪn-/ n
  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
Etymology: 19th Century: from Greek krinoeidēs lily-like

criˈnoidal adj

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