RADIOLITE
Ra"di*o*lite, n. Etym: [L. radius ray + -lite: cf. F. radiolithe.]
(Paleon.)
Defn: A hippurite.
RADIOMETER Ra`di*om"e*ter, n. Etym: [L. radius radius + -meter: cf. F. radiomètre.]
1. (Naut.)
Defn: A forestaff.
2. (Physics)
Defn: 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.
RADIOMETRY
Ra`di*om"e*try, n. (Physics)
Defn: The use of the radiometer, or the measurement of radiation. —
Ra`di*o*met"ric (#), a.