radio compasses

radio compass

noun
a radio receiver with a directional antenna for determining the bearing of the receiver from a radio transmitter.

Origin:
1915–20

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
radio compass
 
n
See also goniometer any navigational device that gives a bearing by determining the direction of incoming radio waves transmitted from a particular radio station or beacon

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Radio compasses is always a great word to know.
So is ninnyhammer. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a fool or simpleton; ninny.
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