/ Dictionary / Index P picowave: Meaning and Definition of Find definitions for: pi•co•wave Pronunciation: (pē'ku-wāv", pī'-), [key] — -waved, -wav•ing. to irradiate (food) with gamma rays in order to retard spoilage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. picot stitch picquet Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language