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 chemistry student used a spectrometer to analyze the unknown liquid, identifying its ingredients by the unique pattern of light absorption it produced. " technology science chemistry physics device Chat with AIVocabulary GamePractice Reading