RADIOMETRY

Etymology

Noun

radiometry (usually uncountable, plural radiometries)

(physics) The branch of science that deals with the detection and measurement of radiant electromagnetic energy.

Source: Wiktionary

Ra`di*om"e*try, n. (Physics)

Definition: The use of the radiometer, or the measurement of radiation. -- Ra`di*o*met"ric (#), a.

Source: Webster’s Unabridged Dictionary 1913 Edition