-graf, -gaa(ə)f, -graif, -grȧf noun
Etymology: International Scientific Vocabulary spectro- + -graph
1. : an apparatus for dispersing radiation into a spectrum and for photographing or mapping the spectrum — see crystal spectrograph, mass spectrograph ; compare spectrogram , spectroscope
2. : sound spectrograph
• spec·tro·graph·ic | ̷ ̷ ̷ ̷|grafik adjective
• spec·tro·graph·i·cal·ly -fə̇k(ə)lē adverb