photometer noun & verb. [fǝ(ʊ)'tɒmɪtǝ] L18.
[from PHOTO- + -METER.]
A. noun. An instrument for measuring the intensity of light or for comparing the intensities of light from different sources. L18.
B. verb trans. Measure the brightness of (a light source or an illuminated surface) by means of a photometer. E20.

■ photo'metric,

■ photo'metrical adjectives M19.

■ photo'metrically adverb by means of a photometer M19.

■ photometrician [-'trɪʃ(ǝ)n] noun L19.

■ photometrist noun M19.

■ photometry noun measurement of light; the use of a photometer: E19.

[TahlilGaran] English Dictionary ▲