Source : Webster's Revised Unabridged Dictionary (1913)

Crinoidea \Cri*noid"e*a\ (kr>isl/*noid"[-e]*[.a]), n. pl. [NL.,
   from Gr. kri`non lily + -oid: cf. F. crino["i]de.] (Zo["o]l.)
   A large class of Echinodermata, including numerous extinct
   families and genera, but comparatively few living ones. Most
   of the fossil species, like some that are recent, were
   attached by a jointed stem. See {Blastoidea}, {Cystoidea},
   {Comatula}.

Source : WordNet®

Crinoidea
     n : sea lilies [syn: {class Crinoidea}]