call sign+◼◼◼noun[UK: kɔːl saɪn] [US: ˈkɒl ˈsaɪn]
call [calls]+◼◼◻noun[UK: kɔːl] [US: ˈkɒl]
call letters+◼◻◻noun
call signal+◼◻◻noun[UK: kɔːl ˈsɪɡ.nəl] [US: ˈkɒl ˈsɪɡ.nəl]
call-sign+noun[UK: kɔːl saɪn] [US: ˈkɒl ˈsaɪn]
calling signal+noun[UK: ˈkɔːl.ɪŋ ˈsɪɡ.nəl] [US: ˈkɒl.ɪŋ ˈsɪɡ.nəl]
line signal+noun[UK: laɪn ˈsɪɡ.nəl] [US: ˈlaɪn ˈsɪɡ.nəl]
theme [themes]+noun[UK: θiːm] [US: ˈθiːm]
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