/ Dictionary / Index P pollen grain: Meaning and Definition of Find definitions for: pol'len grain" Pronunciation: [key] a single granule of pollen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. poll end pollenosis Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language