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actinometer

 

Definitions from WordNet

Noun actinometer has 1 sense
  1. actinometer - an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)
    --1 is a kind of
    measuring instrument, measuring system, measuring device

Definitions from the Web

Actinometer

Noun:

A device used to measure the intensity of radiation, especially sunlight.

Example sentence: The actinometer indicated that the sun's rays were particularly strong today.

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