/ Dictionary / Index D diploblastic: Meaning and Definition of Find definitions for: dip•lo•blas•tic Pronunciation: (dip"lu-blas'tik), [key] — adj. having two germ layers, the ectoderm and endoderm, as the embryos of sponges and coelenterates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diplobacillus diplocardiac Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language