an instrument for detecting and measuring small amounts of radiation, usually by a sensitive thermocouple
radiomicrometer in American English
(ˌreidioumaiˈkrɑmɪtər)
noun
an instrument for measuring small amounts of radiant energy, consisting of a sensitive thermocouple connected to a galvanometer
Word origin
[1885–90; radio- + micrometer]This word is first recorded in the period 1885–90. Other words that entered Englishat around the same time include: classified, lineup, roller coaster, toner, twoferradio- is a combining form with the meanings “dealing with radiant energy” (radiometer), “employing or dealing with radio waves” (radioacoustics; radiolocation; radiotelephone), “emitting rays as a result of the breakup of atomic nuclei” (radioactive; radiocarbon), “characterized by, employing or dealing with such rays” (radiography; radiopaque; radiotherapy)