conelrad

noun

con·​el·​rad

ˈkänᵊlˌrad,

-ˌraa(ə)d

plural -s

: a system for preventing an enemy from using radio signals from any particular AM station as a guide for aircraft or missiles by shifting all AM stations to either of the frequencies 640 or 1240 and having them broadcast in a group in random order for short intervals on only these frequencies

Word History

Etymology

control of electromagnetic radiation

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