noun echi·no·derm \i-ˈkī-nə-ˌdərm\

Definition of echinoderm

  1. :  any of a phylum (Echinodermata) of radially symmetrical coelomate marine animals including the starfishes, sea urchins, and related forms


play \i-ˌkī-nə-ˈdər-mə-təs\ adjective

Origin and Etymology of echinoderm

New Latin Echinodermata, phylum name, from echin- + -dermata (ultimately from Greek derma skin)

First Known Use: 1835

Learn More about echinoderm

Seen and Heard

What made you want to look up echinoderm? Please tell us where you read or heard it (including the quote, if possible).