Breadcrumb Home > Dictionary > Index M mass spectroscope: Meaning and Definition of Find definitions for: mass' spec'troscope Pronunciation: [key] an instrument used to determine the masses of small, electrically charged particles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mass spectrometer mass spectrum TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: nosegay Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language