echinoid Hear it!

echinoid definition

echi·noid (ē kī′no̵id′, ek′ə-)

adjective

of or like a sea urchin

Etymology: echin(o)- + -oid

noun

any of a class (Echinoidea) of echinoderms, including the sea urchins and sand dollars

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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