A a


    • US Pronunciation
    • US IPA
    • UK Pronunciation
    • UK IPA
    • [ak-tuh-nom-i-ter]
    • /ˌæk təˈnɒm ɪ tər/
    • /ˌaktɪnˈɒmɪtə/
    • US Pronunciation
    • US IPA
    • [ak-tuh-nom-i-ter]
    • /ˌæk təˈnɒm ɪ tər/

Definitions of actinometer word

  • noun actinometer an instrument for measuring the intensity of radiation, esp of the sun's rays 3
  • noun actinometer an instrument for measuring the intensity of the sun's rays, or the actinic effect of light rays 3
  • noun actinometer exposure meter 3
  • noun actinometer a device for measuring intensity of radiation, especially that of the sun. 1
  • noun actinometer An instrument for measuring the intensity of radiation, typically ultraviolet radiation. 1
  • noun actinometer (physics) A device used to measure the heating power of electromagnetic radiation, especially that of solar radiation. 0

Information block about the term

Origin of actinometer

First appearance:

before 1825
One of the 37% newest English words
First recorded in 1825-35; actino- + -meter

Historical Comparancy

Parts of speech for Actinometer


actinometer popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 62% of English native speakers know the meaning and use word.
According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

actinometer usage trend in Literature

This diagram is provided by Google Ngram Viewer

Synonyms for actinometer

noun actinometer

  • photometer — an instrument that measures luminous intensity or brightness, luminous flux, light distribution, color, etc., usually by comparing the light emitted by two sources, one source having certain specified standard characteristics.
  • radiometer — Also called Crookes radiometer. an instrument for demonstrating the transformation of radiant energy into mechanical work, consisting of an exhausted glass vessel containing vanes that revolve about an axis when exposed to light.

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