call-sign

Noun

call sign (plural call signs)

1. A combination of letters and numbers used to identify a radio or television station.

   Synonyms:

   call letters

2. Any combination of characters or pronounceable words, which identifies a communication facility, a command, an authority, an activity, or a unit; used primarily for establishing and maintaining communications.
   • Charlie: I'm Charlotte Blackwood.
     Maverick: I'm Maverick.
     Charlie: Did your mother not like you?
     Maverick: No, it's my call sign.1986, Jim Cash, Jack Epps Jr., Top Gun (motion picture)

   Synonyms:

   CS