Greenwich Mean Time

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Greenwich Mean Time (GMT) Local time at Greenwich, London, situated on the prime meridian (0° longitude) that passes through the Old Royal Observatory. It has been used as the basis for calculating standard time in various parts of the world since 1884.

World Encyclopedia

Greenwich Mean Time

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Green·wich Mean Time (abbr.: GMT) (also Green·wich time) the mean solar time at the Greenwich meridian, adopted as the standard time in a zone that includes the British Isles.

The Oxford Pocket Dictionary of Current English

GMT

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GMT • abbr. Greenwich Mean Time.

The Oxford Pocket Dictionary of Current English

GMT

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GMT Abbreviation of Greenwich Mean Time

World Encyclopedia

GMT

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GMT Greenwich Mean Time

The Oxford Dictionary of Abbreviations FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH

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Greenwich mean time

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