photometer
Concise Oxford English Dictionary © 2008 Oxford University Press:
photometer /fə(ʊ)ˈtɒmɪtə/
▶noun an instrument for measuring the intensity of light.
– derivatives
photometric adjective,
photometrically adverb,
photometry noun.
photometric adjective,
photometrically adverb,
photometry noun.
'photometer' also found in these Oxford entries:

