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echinoderm

play
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

echinodermatous

play \-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


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