an instrument for measuring the optical density of a material by directing a beam of light onto the specimen and measuring its transmission or reflection
Derived forms
densitometric (ˌdɛnsɪtəˈmɛtrɪk)
adjective
densitometry (ˌdensiˈtometry)
noun
densitometer in American English
(ˌdɛnsəˈtɑmətər)
noun
1.
a device for measuring optical density, as of a photographic negative