/ Dictionary / Index A aleurone: Meaning and Definition of Find definitions for: al•eu•rone Pronunciation: (al'yu-rōn", u-loor'ōn), [key] — n. protein granulesfound in a single layer of cellsin the outermost portion of the endosperm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aleurone (Thesaurus) aleuromancy Aleus Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language