radiometer

noun

ra·​di·​om·​e·​ter ˌrā-dē-ˈä-mə-tər How to pronounce radiometer (audio)
: an instrument for detecting and usually for measuring the intensity of radiant energy
radiometry
ˌrā-dē-ˈä-mə-trē How to pronounce radiometer (audio)
noun

Illustration of radiometer

Illustration of radiometer

Examples of radiometer in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The satellite will also use cutting-edge RF-System-on-Chip (RFSoC) technology to power its miniature radiometer. — Mrigakshi Dixit, Interesting Engineering, 14 Aug. 2026 The mission was supposed to carry six instruments to the moon's surface — five Canadian payloads and a NASA radiometer flying under a NASA-CSA agreement. — Elizabeth Howell, Space.com, 25 Mar. 2026 Juno also has a magnetometer, a gravity science system and a microwave radiometer. — Jamie Carter, Forbes.com, 22 May 2025 Juno has other instruments too, including a magnetometer to map Jupiter's magnetic field and a microwave radiometer to measure the abundance of water and ammonia in the planet's atmosphere. — Thomas G. Moukawsher, Newsweek, 6 Nov. 2024 See All Example Sentences for radiometer

Word History

First Known Use

1875, in the meaning defined above

Time Traveler
The first known use of radiometer was in 1875

Rhymes for radiometer

See All Rhymes for radiometer

Browse Nearby Words

radiometeorograph
radiometer
radiometric
See all Nearby Words

Cite this Entry

“Radiometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiometer. Accessed 22 Aug. 2026.

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Kids Definition

radiometer

noun
ra·​di·​om·​e·​ter ˌrād-ē-ˈäm-ət-ər How to pronounce radiometer (audio)
: an instrument for measuring the strength of radiant energy
radiometric
ˌrād-ē-ō-ˈme-trik
adjective
radiometry
-ˈäm-ə-trē How to pronounce radiometer (audio)
noun

Medical Definition

radiometer

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

Britannica.com: Encyclopedia article about radiometer

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