[ ih-kahy-noid, ek-uh-noid ]
/ ɪˈkaɪ nɔɪd, ˈɛk əˌnɔɪd /
belonging or pertaining to the class Echinoidea, comprising mainly sea urchins and sand dollars.
any echinoderm of the Echinoidea.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for echinoid
A pair of ciliated epaulettes on each side of and behind the ciliated ring is very characteristic of some Echinoid larv.The Works of Francis Maitland Balfour, Volume II (of 4)|Francis Maitland Balfour
The rows of plates in an Echinoid which are not perforated for the emission of the "tube-feet."The Ancient Life History of the Earth|Henry Alleyne Nicholson
British Dictionary definitions for echinoid
/ (ɪˈkaɪnɔɪd, ˈɛkə-) /
any of the echinoderms constituting the class Echinoidea, typically having a rigid ovoid body. The class includes the sea urchins and sand dollars
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