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View synonyms for actinometer

actinometer

[ ak-tuh-nom-i-ter ]

noun

  1. a device for measuring intensity of radiation, especially that of the sun.


actinometer

/ ˌæktɪnəʊˈmɛtrɪk; ˌæktɪˈnɒmɪtə /

noun

  1. an instrument for measuring the intensity of radiation, esp of the sun's rays


actinometer

/ ăk′tə-nŏmĭ-tər /

  1. Any of several instruments used to measure radiation, such as a pyrheliometer.


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Derived Forms

  • ˌactiˈnometry, noun
  • actinometric, adjective

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Other Words From

  • ac·tin·o·met·ric [ak-tin-oh-, me, -trik, ak-t, uh, -noh-], ac·tino·metri·cal adjective
  • acti·nome·try noun

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Word History and Origins

Origin of actinometer1

First recorded in 1825–35; actino- + -meter

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Example Sentences

For judging long exposures, the use of an actinometer (issued in many inexpensive forms) is helpful.

We then shift the paper in the actinometer so as to get a fresh portion under the tissue strips, or we substitute a new piece.

Now refer to the actinometer and see what has taken place on the silver paper which we put into it.

The mystery was not a new type of infernal machine as they imagined but merely a home-made actinometer!

A very suitable instrument for timing the exposure of carbon tissue is Sawyer's actinometer.

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actinomereactinomorphic