call letter

call letters

plural noun
letters of the alphabet or such letters in combination with numbers for identifying a radio or television station, an amateur radio transmitting device, or the like.
Also called call sign.


Origin:
1910–15

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World English Dictionary
call letters
 
pl n
the call sign of an American or Canadian radio station, esp that of a commercial broadcasting station

Collins English Dictionary - Complete & Unabridged 10th Edition
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