Spectrographic is a term that describes something that is related to spectrography, a scientific technique used to study the properties of matter by analyzing its light. There are many words that can be used interchangeably with spectrographic, such as spectral, spectroscopic, and spectrometric. All of these words refer to the use of spectroscopy to study and analyze the light emitted or absorbed by matter. Other synonyms include photometric, radiometric, and spectrophotometric. Each of these words has nuances in meaning, but all refer to the same general area of study, which is the properties of matter as revealed through the analysis of light.