/ Dictionary / Index D DHA: Meaning and Definition of Find definitions for: DHA Pronunciation: [key] — Biochem. Biochem. docosahexaenoic acid: an omega-3 fatty acid present in fish oils. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. DH Dhahran Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language