/ Dictionary / Index L luteo-: Meaning and Definition of Find definitions for: luteo- Pronunciation: [key] a combining form meaning “golden yellow,” used in the formation of compound words: luteotropin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lutenist luteolin 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