/ Dictionary / Index P placode: Meaning and Definition of Find definitions for: plac•ode Pronunciation: (plak'ōd), [key] — n. Embryol. a local thickening of the endoderm in the embryo, that usually constitutes the primordium of a specific structure or organ. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. placket placoderm Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language