Examples from the Web for spectrograph
Page 230: spectrograph was misprinted as spectograph; corrected here.
The shades and blends between "Yep" and "Ye-oh" alone are sufficient to put a spectrograph of the sun to shame.Across America by Motor-cycle|C. K. Shepherd
I don't know how successfully we can get a spectrograph of the comet, but it's worth an attempt.The Year When Stardust Fell|Raymond F. Jones