radiometer

noun

ra·​di·​om·​e·​ter ˌrā-dē-ˈä-mə-tər 

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

radiometry

ˌrā-dē-ˈä-mə-trē 

noun

Illustration of radiometer

Examples of radiometer in a Sentence

Recent Examples on the Web

As its name implies, placing the radiometer in light produces a measurable change: the blades start spinning. —Andrew Cunningham, ArsTechnica, 14 Aug. 2025

From this unique vantage point, the probe aims to deploy a sensitive radiometer designed to detect low-frequency radio signals. —Sharmila Kuthunur, Space.com, 21 July 2025

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

Word History

First Known Use

1875, in the meaning defined above

Rhymes for radiometer

• anemometer
• audiometer
• densitometer
• diffractometer
• dilatometer
• dynamometer
• electrometer
• extensometer
• goniometer
• magnetometer
• penetrometer
• piezometer

Kids Definition

radiometer

noun

ra·​di·​om·​e·​ter ˌrād-ē-ˈäm-ət-ər 

: an instrument for measuring the strength of radiant energy

radiometric

ˌrād-ē-ō-ˈme-trik

adjective

radiometry

-ˈäm-ə-trē 

noun

Medical Definition

radiometer

noun

ra·​di·​om·​e·​ter ˌrād-ē-ˈäm-ət-ər 

: an instrument for measuring the intensity of radiant energy

also : an instrument for measuring electromagnetic radiation or sound waves