Pho·tŏm'e·ter, n.
n. [Fr. photomètre, from Gr. φῶς, φωτός, light, and μέτρον, measure.] An instrument for measuring the relative intensities of light.
n. [Fr. photomètre, from Gr. φῶς, φωτός, light, and μέτρον, measure.] An instrument for measuring the relative intensities of light.