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Webster 1913 Edition
Radiomicrometer
Raˊdi-o-mi-crom′e-ter
(rāˊdĭ-ō̍-mī̍-krŏm′ē̍-tẽr)
, Noun.
 [
Radio- 
+ micrometer
.] (Physics) 
A very sensitive modification or application of the thermopile, used for indicating minute changes of radiant heat, or temperature. 
Definition 2025
radiomicrometer
radiomicrometer
English
Noun
radiomicrometer (plural radiomicrometers)
- a device used to measure small changes in radiant heat, or in temperature