spec·tros·co·py (sp?k-tr?s?k?-p?)n. pl. spec·tros·co·pies 1. The study of spectra, especially experimental observation of optical spectra or mass spectra, to determine the properties of their source.2. A variety or instance of such study.spec·tros?co·pist n.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.spectroscopy (sp?k?tr?sk?p?) n (General Physics) the science and practice of using spectrometers and spectroscopes and of analysing spectra, the methods employed depending on the radiation being examined. The techniques are widely used in chemical analysis and in studies of the properties of atoms, molecules, ions, etc spec?troscopist nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014spec?tros?co?py (sp?k?tr?s k? pi, ?sp?k tr??sko? pi) n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865?70] spec?tros?co?pist, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.