Greenwich Mean Time

British  

noun

1.  GMT.  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midnight: formerly a standard time in Britain and a basis for calculating times throughout most of the world, it has been replaced by an atomic timescale See universal time

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Greenwich Mean Time Scientific  

/ grĕn′ĭch /

1. See universal time

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Usage

The name Greenwich mean time is ambiguous, having been measured from mean midday in astronomy up to 1925, and is not used for scientific purposes. It is generally and incorrectly used in the sense of universal coordinated time , an atomic timescale available since 1972 from broadcast signals, in addition to the earliest sense of universal time , adopted internationally in 1928 as the name for GMT measured from midnight

Example Sentences

Greenwich mean time, described as universal tune, is infinitesimalry parochial.

From Time Magazine Archive

Since then Greenwich mean time and the Greenwich meridian have become universally accepted as the foundation of worldwide timekeeping and navigation.

From Time Magazine Archive

In 1892 Greenwich mean time was adopted on the railways and in the post-offices, making a difference of twenty minutes with mean Amsterdam time.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 "Hinduism" to "Home, Earls of" by Various

I fix in advance a moment, say eight o'clock Greenwich mean time, at which signals are to commence.

From The Reminiscences of an Astronomer by Newcomb, Simon

Greenwich mean time, on August 9, 1972, nearly every operating communicator in the fringe of free nations around the territory of the Union of Communist Republics—all communicators blew out.

From The Machine That Saved The World by Leinster, Murray