mean solar time on the 0° meridian passing through Greenwich, England, measured from midnight: formerly a standard time in Britain and a basis for calculating times throughout most of the world, it has been replaced by an atomic timescale: Abbreviation: GMT See universal time
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How to use Greenwich Mean Time in a sentence
Just what the words "Greenwich Mean Time" signify, will be explained in more detail later on.Lectures in Navigation | Ernest Gallaudet Draper
Scientific definitions for Greenwich Mean Time
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