radiometer
(noun) meter to detect and measure radiant energy (electromagnetic or acoustic)
Source: WordNet® 3.1
radiometer (plural radiometers)
A device that measures radiant energy.
• remediator, retroamide
Source: Wiktionary
Ra`di*om"e*ter, n. Etym: [L. radius radius + -meter: cf. F. radiomètre.]
1. (Naut.)
Definition: A forestaff.
2. (Physics)
Definition: An instrument designed for measuring the mechanical effect of radiant energy.
Note: It consists of a number of light discs, blackened on one side, placed at the ends of extended arms, supported on an a pivot in an exhausted glass vessel. When exposed to rays of light or heat, the arms rotate.
Source: Webster’s Unabridged Dictionary 1913 Edition
7 June 2025
(noun) a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
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