1834, from Modern Latin Echinodermata, name of the phylum that includes starfish and sea urchins, from Latinized form of Greek ekhinos "sea urchin," originally "porcupine, hedgehog" [..]

phylum of marine invertebrate including sea stars and sea urchins.

(Gk: ekhinos= hedgehog, sea urchin; derma= skin; the prickly skinned) an animal belonging to the phylum Echinodermata which occur exclusively in the sea. They have an internal calcium carbonate skelet [..]

Member of a major phylum within the deuterostomes that includes sea urchins, starfish, crinoids, and sea cucumbers. Although they possess bilateral symmetry initially, adults usually show a fivefold r [..]

a phylum of exclusively marine, invertebrate animals, nearly all of which have pentaradiate symmetry (5 axes of symmetry) in the adult form and an endoskeleton made of calcium carbonate plates.

invertebrate sea animal with a spiny skeleton, a water vascular system, and tube feet. eclipse

a spiny-skinned marine animal that has five-part radial symmetry—for example, starfish, seaurchin

(n) marine invertebrates with tube feet and five-part radially symmetrical bodies

marine invertebrates with tube feet and five-part radially symmetrical bodies. The group includes sea urchins, sea stars, sea cucumbers, brittle stars, and crinoids.

A marine invertebrate animal that has tube feet and five-part radial symmetry. Sea stars and sea cucumbers are both echinoderms, which means “spiny-skinned.”

An invertebrate marine animal usually characterised by a five-fold symmetry, and possessing an internal skeleton of calcite plates, and a complex water vascular system. Includes echinoids (sea urchins [..]

a radially symmetrical marine invertebrate that has an endoskeleton, such as a starfish, a sea urchin, or a sea cucumber