English word spectrogram comes from English spectro- (Optical spectra.), English -gram (Something written, drawn or otherwise recorded.)

Detailed word origin of spectrogram

Dictionary entry	Language	Definition
spectro-	English (eng)	Optical spectra.
-gram	English (eng)	Something written, drawn or otherwise recorded.
spectrogram	English (eng)	(astronomy) A visual representation of the spectrum of a celestial body's radiation.. A visual representation of the spectrum of a sound changing through time.

Words with the same origin as spectrogram