/ Dictionary / Index D decasyllabic: Meaning and Definition of Find definitions for: dec•a•syl•lab•ic Pronunciation: (dek"u-si-lab'ik), [key] — adj. having ten syllables: a decasyllabic verse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: decasyllabic (Thesaurus) decasualize decasyllable Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language