actinometer

noun
ac·​ti·​nom·​e·​ter | \ ˌak-tə-ˈnä-mə-tər How to pronounce actinometer (audio) \

Definition of actinometer

: any of various instruments for measuring the intensity of incident radiation especially : one in which the intensity of radiation is measured by the speed of a photochemical reaction

Other Words from actinometer

actinometric \ ˌak-​tə-​nō-​ˈme-​trik How to pronounce actinometer (audio) \ adjective
actinometry \ ˌak-​tə-​ˈnä-​mə-​trē How to pronounce actinometer (audio) \ noun

Examples of actinometer in a Sentence

Recent Examples on the Web More advanced systems can have all that, plus all or a selection of these: a rain gauge, an anemometer for measuring wind speed and direction, a barometer, and an actinometer for checking UV index and solar radiation. Adrienne Donica, Popular Mechanics, 4 Jan. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'actinometer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of actinometer

1833, in the meaning defined above

History and Etymology for actinometer

actino- + -meter

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Time Traveler for actinometer

Time Traveler

The first known use of actinometer was in 1833

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Dictionary Entries Near actinometer

actinomere

actinometer

actinomorphic

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Cite this Entry

“Actinometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actinometer. Accessed 3 Dec. 2021.

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More Definitions for actinometer

actinometer

noun
ac·​ti·​nom·​e·​ter | \ ˌak-tə-ˈnäm-ət-ər How to pronounce actinometer (audio) \

Medical Definition of actinometer

: any of various instruments for measuring the intensity of incident radiation especially : one in which the intensity of radiation is measured by the speed of a photochemical reaction

Other Words from actinometer

actinometric \ -​nō-​ˈme-​trik How to pronounce actinometer (audio) \ adjective
actinometry \ -​ˈnäm-​ə-​trē How to pronounce actinometer (audio) \ noun, plural actinometries

More from Merriam-Webster on actinometer

Britannica.com: Encyclopedia article about actinometer

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