Dictionary entry

Radiomicrometer

Webster's Dictionary 1913

Ra′di‐o‐mi‐crom″e‐ter (–ō̍‐mī̍‐krŏm″ē̍‐tẽr), n. [Radio- + micrometer.] (Physics) A very sensitive modification or application of the thermopile, used for indicating minute changes of radiant heat, or temperature.