/ Dictionary / Index H hexacosanoic acid: Meaning and Definition of Find definitions for: hex'a•co•sa•no'ic ac'id Pronunciation: (hek'su-kō-su-nō'ik, hek"su-). [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hexachord hexad Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language