spectrometerPronunciation: /spɛkˈtrɒmɪtə/Definition of spectrometer noun an apparatus used for recording and measuring spectra, especially as a method of analysis. Derivatives spectrometricPronunciation: /spɛktrəˈmɛtrɪk/ adjective spectrometry noun spectrometer in other Oxford dictionaries Definition of spectrometer in the US English dictionary