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Having body tissues derived from only two germ layers, the endoderm and the ectoderm, as in the cnidarians.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biology) (of jellyfish, corals, and other coelenterates) having a body developed from only two germ layers (ectoderm and endoderm). Compare triploblastic
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
dip•lo•blas•tic(ˌdɪp ləˈblæs tɪk)
having two embryological germ layers, the ectoderm and endoderm, as in cnidarians.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.