/ Dictionary / Index S snow grains: Meaning and Definition of Find definitions for: snow' grains" Pronunciation: [key] precipitation consisting of white, opaque ice particles usually less than one millimeter in diameter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. snow goose snow guard Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language