An instrument for producing and observing spectra.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "spectroscope" in a sentence
"Here the refracting prism -- or the combination of prisms known as the "spectroscope" -- comes to its aid, teaching it to measure as well as to perceive."
"You will find it very interesting to make the first of Newton's experiments yourself, and some day perhaps you will hear what wonderful things about the sun and the stars are being learnt in our own time by means of the spectroscope, which is an instrument having a fine slit through which the ray is passed before it is allowed to fall upon the prism."
"The essential parts of a spectroscope are the slit -- an opening perhaps"