radio direction finder
noun
a navigational aid establishing a fix by means of the bearings of two known radio stations. Abbreviation: RDF
Nearby words
radio beam, radio car, radio collar, radio compass, radio control, radio direction finder, radio free europe/radio liberty, radio frequency, radio galaxy, radio horizon, radio interferometer
Origin of radio direction finder
First recorded in 1920–25
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019