photometer UK /fəˈtɒmɪtə(ɹ)/US /fəˈtɑmɪtɚ/noun 1verb 1forms 3 noun1 •Any of several instruments used to measure various aspects of the intensity of light. verb1 •To measure some aspect of light (from a star) using a photometer. formsphotometered · photometering · photometers
