/ Dictionary / Index P primary producer: Meaning and Definition of Find definitions for: pri'mary produc'er Pronunciation: [key] — Biol. Biol. any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. primary process primary quality Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language