/ Dictionary / Index D duodecagon: Meaning and Definition of Find definitions for: du•o•dec•a•gon Pronunciation: (d"u-dek'u-gon", dy"-), [key] — n. Geom. dodecagon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. duo duodecastyle Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language