/ Dictionary / Index M microwave spectrum: Meaning and Definition of Find definitions for: mi'crowave spec"trum Pronunciation: [key] a spectrum of electromagnetic radiations whose wavelengths fall in the microwave range. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microwave spectroscopy microzoon Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language