noun Download 🔗Share An optical instrument for measuring the absorption of light by chemical substances; typically it will plot a graph of absorption versus wavelength or frequency, and the patterns produced are used to identify the substances present, and their internal structure. Examples : "The chemist used spectrometers to analyze the different colored solutions in the lab, identifying the unknown compounds and their structures. " technology science physics chemistry device machine Chat with AIVocabulary GamePractice Reading