spectrometer [spectrometers](instrument for measuring the absorption of light by chemical substances) noun [UK: spek.ˈtrɒ.mɪ.tə(r)] [US: spek.ˈtrɑː.mə.tər]
spectroscope [spectroscopes](optical instrument used for spectrographic analysis) noun [UK: ˈspek.trə.skəʊp] [US: ˈspek.trəskoʊp]