/ Dictionary / Index L luteolin: Meaning and Definition of Find definitions for: lu•te•o•lin Pronunciation: (l'tē-u-lin), [key] — n. Chem. a yellow coloring substance, CHO, obtained from the weed Reseda luteola: used in dyeing silk and, formerly, in medicine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. luteo- luteotropic Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language