MSF.
The MSF radio time signal, formerly the Rugby clock, a time signal by the UK NPL.
Meaning & usage
The MSF radio time signal, formerly the Rugby clock, a time signal by the UK NPL.
Where this word comes from
From the Rugby transmitter’s call sign, MSF, where M is one of the ITU prefixes allocated to the United Kingdom, and the letters SF were allocated for no documented reason.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.