/ Dictionary / Index H hypoadrenalism: Meaning and Definition of Find definitions for: hy•po•a•dre•nal•ism Pronunciation: (hī"pō-u-drēn'l-iz"um, -u-dren'-), [key] — n. underactivity of the adrenal gland, as in Addison's disease. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hypoadrenalism (Thesaurus) hypoadenia hypoaeolian mode Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language