Meaning of echinoderm

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.

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