radiometer Meaning, Definition & Usage

  1. noun meter to detect and measure radiant energy (electromagnetic or acoustic)

WordNet

Ra`di*om"e*ter noun
Etymology
L. radius radius + -meter: cf. F. radiomètre.
Definitions
  1. (Naut.) A forestaff.
  2. (Physics) An instrument designed for measuring the mechanical effect of radiant energy. ✍ 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.

Webster 1913