Dictionary
e•chi•no•derm
Pronunciation: (i-kī'nu-dûrm", ek'u-nu-), [key]—
n.
any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea urchins, sea cucumbers, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.