ra·​di·​om·​e·​ter | \ ˌrā-dē-ˈä-mə-tər How to pronounce radiometer (audio) \

Definition of radiometer

: an instrument for detecting and usually for measuring the intensity of radiant energy

Illustration of radiometer

Illustration of radiometer

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Other Words from radiometer

radiometry \ ˌrā-​dē-​ˈä-​mə-​trē How to pronounce radiometer (audio) \ noun

Examples of radiometer in a Sentence

Recent Examples on the Web Each unit is fitted with a microwave radiometer, so researchers and forecasters will be able to see phenomena not visible to the naked eye, like water vapor and temperature information. Meghan Herbst, Wired, 25 June 2021 The qualification unit is expected to start providing radiometer data within a few weeks. Meghan Herbst, Wired, 25 June 2021 Scientists will use the microwave radiometer to identify what the lighter and darker patches on the moon are made of and how the moon maintains its frozen shell, per Elizabeth Gamillo, Smithsonian Magazine, 7 June 2021 Valero proposed two instruments: a camera called EPIC to image clouds and other climate-influencing factors such as pollution, volcanic ash and seasonal vegetation; and a radiometer named NISTAR to measure the energy coming from Earth. Mark Zastrow, Scientific American, 15 Jan. 2015 Every station except for the highest one is outfitted with a net radiometer, an instrument that measures incoming and outgoing radiation, and the lower stations also carry rain gauges and present weather sensors. Maddie Stone, Anchorage Daily News, 13 Dec. 2019 Data from aircraft radiometers, which infer surface wind speed from above by looking at the state of the sea surface. Adam Sobel, New York Times, 1 Sep. 2019 In addition to its weighted arm for hopping, MASCOT had a camera, a magnetometer, a radiometer, and infrared spectrometer. John Timmer, Ars Technica, 22 Aug. 2019 In 1879, another titan of science, the Scottish physicist James Clerk Maxwell, pointed out that the Navier-Stokes equations fail to explain a near-vacuum experiment called the Crookes radiometer — apparently unbeknownst to Hilbert. Quanta Magazine, 21 July 2015

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

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First Known Use of radiometer

1875, in the meaning defined above

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Time Traveler for radiometer

Time Traveler

The first known use of radiometer was in 1875

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Last Updated

14 Oct 2021

Cite this Entry

“Radiometer.” Dictionary, Merriam-Webster, Accessed 26 Oct. 2021.

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More Definitions for radiometer


ra·​di·​om·​e·​ter | \ ˌrād-ē-ˈäm-ət-ər How to pronounce radiometer (audio) \

Medical Definition of radiometer

: an instrument for measuring the intensity of radiant energy also : an instrument for measuring electromagnetic radiation or sound waves

More from Merriam-Webster on radiometer Encyclopedia article about radiometer


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