/ Dictionary / Index M mass spectrograph: Meaning and Definition of Find definitions for: mass' spec'trograph Pronunciation: [key] a mass spectroscope for recording a mass spectrum on a photographic plate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mass society mass spectrometer Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language