Dictionary
e•chi•noid
Pronunciation: (i-kī'noid, ek'u-noid"), [key]—
adj.
belonging or pertaining to the class Echinoidea, comprising mainly sea urchins and sand dollars.
—
n.
any echinoderm of the Echinoidea.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.