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Meaning of actinograph in English:

actinograph

noun

  • 1An instrument for recording variations in the intensity of solar radiation.

  • 2Photography
    historical A form of calculator for estimating the actinic power of daylight, to aid in determining an appropriate exposure.

Pronunciation

actinograph

/akˈtɪnəɡrɑːf/ /akˈtɪnəɡraf/

Origin

Mid 19th century; earliest use found in John Herschel (1792–1871), mathematician and astronomer. From actino- + -graph.