from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An instrument used to determine the masses of atoms or molecules, in which a beam of charged particles is passed through an electromagnetic field that separates particles of different masses. The resulting distribution or spectrum of masses is recorded on a photographic plate.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics, analytical chemistry A
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a mass spectrometer that produces a graphical representation of the mass spectrum
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