单词	actinometer
释义	actinometer noun ac·​ti·​nom·​e·​ter ˌak-tə-ˈnä-mə-tər  : 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 actinometric ˌak-tə-nō-ˈme-trik  adjective actinometry ˌak-tə-ˈnä-mə-trē  noun Example Sentences 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 Word History Etymology actino- + -meter First Known Use 1833, in the meaning defined above Medical Definition actinometer noun ac·​ti·​nom·​e·​ter ˌak-tə-ˈnäm-ət-ər  : 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
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