73
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Translingual
Etymology
(telecommunications): From entry 73 in the Phillips Code, originally a list from 1 to 92 of numeric codes used to abbreviate common phrases used on telegraph lines.
Symbol
- The cardinal number seventy-three.
Symbol
73
- (telecommunications) regards, best regards (a valediction among ham radio enthusiasts).
Usage notes
- 73s is occasionally used, but is etymologically incorrect, as 73 is already plural.