echinoid

[ih-kahy-noid, ek-uh-noid]
noun
  1. any echinoderm of the Echinoidea.

Origin of echinoid

1850–55; < New Latin Echinoidea; see echinus, -oidea
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for echinoid

Historical Examples of echinoid


British Dictionary definitions for echinoid

echinoid

noun
  1. any of the echinoderms constituting the class Echinoidea, typically having a rigid ovoid body. The class includes the sea urchins and sand dollars
adjective
  1. of or belonging to this class
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012