Echinodermata n. pl. : One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata.

Example:
What are the enemies of Echinodermata?

Taxonomy
echinoderms, sea urchins, starfish, sea cucumbers, organisms, crinoids, skeleton, brittle stars, tube feet, spines, arms, chordates, plates, radial symmetry, phylum Echinodermata, sessile, body, surfaces.

Defination from the web:
echinodermata), plural of εχινόδερμα (echinoderma), "spiny skin" and that from εχινός (echinos) ... Larval Echinodermata Fact Sheet. v • d • e. Opisthokonta: Extant phyla of kingdom Animalia by subkingdom. Parazoa ...