ECHINODERM
- A marine invertebrate of the phylum Echinodermata, such as a starfish, sea urchin, or sea cucumber
- one of the Echinodermata, starfishes, sand dollars, sea urchins, and sea cucumbers [n -S]
- a member of phylum Echinodermata, such as a starfish or sea urchin [n ECHINODERMS]