A spectroscope equipped with scales for measuring wavelengths or indexes of refraction.(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 "spectrometer" in a sentence
"One of the things they use to help analyze this is something we call the spectrometer and what this basically does is measures wavelengths of light."
"That afternoon I was ferried to the mountaintop and introduced to the telescopes and the spectrometer, which is affixed to the base of the big mirror like an oversize parasite to its host."
"The spectrometer is a large particle physics experiment package that is expected to shed light on the nature and evolution of the universe."