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Adjacent Words

Photoluminescence
Photoluminescent
photolysis
photolytic
photolytically
photolyzable
photolyze
Photomagnetic
Photomagnetism
photomap
photomask
photomechanical
photomechanically
photomechanics
Photometric
photometrical
photometrically
photometrician
photometrist
photometry
Photomezzotype
photomicrograph
photomicrographic
photomicrography
photomok
photomontage
photomorphogenesis

Photometer definitions

Webster's 1828 Dictionary

PHOTOM'ETER, n. [Gr. light, and measure.]
An instrument for measuring the relative intensities of light.

WordNet (r) 3.0 (2005)

n
1: measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
2: photographic equipment that measures the intensity of light [syn: light meter, exposure meter, photometer]

Merriam Webster's

noun Etymology: New Latin photometrum, from phot- + -metrum -meter Date: 1778 an instrument for measuring luminous intensity, luminous flux, illumination, or brightness

Oxford Reference Dictionary

n. an instrument for measuring light. Derivatives: photometric adj. photometry n.

Webster's 1913 Dictionary

Photometer Pho*tom"e*ter, n. [Photo- + -meter: cf. F. photom[`e]tre.] (Physics) An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.



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