/ Dictionary / Index A aldosterone: Meaning and Definition of Find definitions for: al•do•ste•rone Pronunciation: (al"dō-sti-rōn', al'dō-sti-rōn", al-dos'tu-rōn"), [key] — n. Biochem. a hormone produced by the cortex of the adrenal gland, instrumental in the regulation of sodium and potassium reabsorption by the cells of the tubular portion of the kidney. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aldosterone (Thesaurus) aldose aldosteronism Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language