Photometric vs Photometer - What's the difference?

photometric | photometer |

Photometric is a related term of photometer.

As an adjective photometric

is of or relating to photometry or to photometers.

As a noun photometer is

(physics) any of several instruments used to measure various aspects of the intensity of light.

As a verb photometer is

(astronomy) to measure some aspect of light (from a star) using a photometer.