spectrographic
- a relating to or employing a spectrograph
- A discrepancy between the spectrographic and chemical calculations of the weight of the hydrogen atom suggested that there must be a rare isotope of hydrogen mixed with the .
- Many a scientist's fond hope that there was life on Mars was dashed in 1963 when spectrographic studies revealed that the Martian atmosphere is as much as 50 times thinner than the.
- While working with the same spectrographic equipment that the French had used to examine the dwarf starlight, one of the astronomers struck a match.