radiometer.

An instrument that measures the power or intensity of radiation, especially light or heat radiation.

Use it for

Words that belong together

• a solar radiometer
• radiometer measurements

On the page

The radiometer showed a steady rise in energy reaching the exposed surface.

Usage notes

Primary category: sci-fi. Forms: Singular radiometer; plural radiometers. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, setting. Commonness: uncommon.