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

actinometric

-nō-ˈme-trik 

adjective

actinometry

-ˈnäm-ə-trē 

noun

plural actinometries