Definitions for "Echinodermata"
radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
Phylum of benthic animals having bilateral symmetry in larval forms and usually a five-sided radial symmetry as adults; phylum includes sea stars and brittle stars.
Echinoderms (meaning "spiny skin") are a phylum of salt-water animals whose living members have five arms or rays (or multiples of five). They are mostly bottom-dwellers. These invertebrates include: starfish, sea urchins, sand dollars, crinoids, sea squirts, sea cucumbers, etc.
One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata.