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