Greenwich Mean Time

Green·wich Mean Time

or Green·wich time G0262800 (grĕn′ĭch, grĭn′ĭj)n.1. See coordinated universal time.2. See universal time.

Greenwich Mean Time

Greenwich Time

n (Physical Geography) 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midnight: formerly a standard time in Britain and a basis for calculating times throughout most of the world, it has been replaced by an atomic timescale.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 timeUsage: 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

Green·wich Mean Time

(grĕn′ĭch) See universal time.

Greenwich Mean Time

See: Universal Time. Also called GMT.

Thesaurus

Noun

Greenwich Mean Time - the local time at the 0 meridian passing through Greenwich, England; it is the same everywhereGMT, Greenwich Time, universal time, UT, UT1time - the continuum of experience in which events pass from the future through the present to the pastcoordinated universal time, UTC - Greenwich Mean Time updated with leap seconds

Translations

oratempo medio di Greenwich

Greenwich Mean Time

Greenwich mean time

Greenwich meridian time

(GMT), the former name for mean solar time at the site of the Royal Observatory in Greenwich, England, which is located on the prime meridianprime meridian,
meridian that is designated zero degree (0°) longitude, from which all other longitudes are measured. By international convention, it passes through the site of the Royal Observatory in Greenwich, England; for this reason, it is sometimes called the Greenwich
..... Click the link for more information. . In 1925 the numbering system was changed to make GMT equivalent to civil timecivil time,
local time based on universal time. Civil time may be formally defined as mean solar time plus 12 hr; the civil day begins at midnight, while the mean solar day begins at noon.
..... Click the link for more information. at the prime meridian, and in 1928 the International Astronomical Union changed the designation of the standard timestandard time,
civil time used within a given time zone. The earth is divided into 24 time zones, each of which is about 15° of longitude wide and corresponds to one hour of time. Within a zone all civil clocks are set to the same local solar time.
..... Click the link for more information. of the prime meridian to universal timeuniversal time
(UT), the international time standard common to every place in the world, it nominally reflects the mean solar time along the earth's prime meridian (renumbered to equate to civil time).
..... Click the link for more information. (UT), which is now in general use.

Greenwich mean time

(GMT) The mean solar time on the longitude (0°) at Greenwich, in the UK, reckoned from midnight. In 1928, on the recommendation of the IAU, GMT became known as universal time (UT) for scientific purposes; the version coordinated universal time, available since 1972 from broadcast signals, is now generally known as GMT.

Greenwich mean time

[′gren·ich ′mēn ¦tīm] (astronomy) Mean solar time at the meridian of Greenwich. Abbreviated GMT. Also known as Greenwich civil time; universal time; Z time; zulu time.

Greenwich Mean Time (GMT)

The arc of the equatorial measured westward intercepted between the Greenwich antimeridian and the meridian of the mean sun. Also called Zulu time.

Greenwich Mean Time

, Greenwich Time 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

Greenwich Mean Time

(time, standard)(GMT) The local time on the Greenwichmeridian, based on the hypothetical mean sun (which averagesout the effects of the Earth's elliptical orbit and its tiltedaxis). GMT is the basis of the civil time for the UK.

In 1925 the reference point was changed from noon to midnightand it was recommended that the term "Universal Time" shouldbe used for the new GMT.

Authorities disagreed on whether GMT equates with UT0 orUT1, however the differences between the two are of theorder of thousandths of a second. GMT is no longer used forscientific purposes.

Greenwich Mean Time

Green·wich Mean Time

Greenwich Mean Time

Greenwich Time

Green·wich Mean Time

Greenwich Mean Time

Greenwich Mean Time

Greenwich mean time

Greenwich meridian time

Greenwich mean time

Greenwich mean time

Greenwich Mean Time (GMT)

Greenwich Mean Time

Greenwich Mean Time

Greenwich Mean Time

Greenwich Mean Time

Greenwich Mean Time

Synonyms for Greenwich Mean Time

noun the local time at the 0 meridian passing through Greenwich, England

Synonyms

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