/ Dictionary / Index D dodecasyllable: Meaning and Definition of Find definitions for: do•dec•a•syl•la•ble Pronunciation: (dō-dek"u-sil'u-bul, dō"dek-), [key] — n. a word or line of verse containing 12 syllables. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dodecasyllabic dodecyl aldehyde Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language