- spectrograph - a spectroscope by which spectra can be photographed
--1 is a kind of spectroscope, prism spectroscope
--1 has particulars: sound spectrograph- spectrogram, spectrograph - a photographic record of a spectrum
--2 is a kind of photograph, photo, exposure, pic
--2 has particulars: visible speech - spectrogram, spectrograph - a photographic record of a spectrum