universal time

n. Abbr. UT

The mean solar time for the meridian at Greenwich, England, used as a basis for calculating time throughout most of the world. Also called Greenwich time, Greenwich Mean Time, Zulu time.

universal time

1. (Mathematics & Measurements / Units) (from 1928) name adopted internationally for Greenwich Mean Time (measured from Greenwich midnight), now split into several slightly different scales, one of which (UT1) is used by astronomers Abbreviation UT

2. (Mathematics & Measurements / Units) Also called universal coordinated time an internationally agreed system for civil timekeeping introduced in 1960 and redefined in 1972 as an atomic timescale. Available from broadcast signals, it has a second equal to the International Atomic Time (TAI) second, the difference between UTC and TAI being an integral number of seconds with leap seconds inserted when necessary to keep it within 0.9 seconds of UT1 Abbreviation UTC

universal time

The mean time for the meridian at Greenwich, England (0° longitude), which runs through the former site of the Royal Observatory. It is based on the sidereal period of Earth's rotation and is used as a basis for calculating standard clock time throughout most of the world. Also called Greenwich Mean Time. Compare coordinated universal time.

A measure of time that conforms, within a close approximation, to the mean diurnal rotation of the Earth and serves as the basis of civil timekeeping. Universal Time (UT1) is determined from observations of the stars, radio sources, and also from ranging observations of the moon and artificial Earth satellites. The scale determined directly from such observations is designated Universal Time Observed (UTO); it is slightly dependent on the place of observation. When UTO is corrected for the shift in longitude of the observing station caused by polar motion, the time scale UT1 is obtained. When an accuracy better than one second is not required, Universal Time can be used to mean Coordinated Universal Time. Also called ZULU time. Formerly called Greenwich Mean Time.

ThesaurusLegend: Synonyms Related Words Antonyms

Noun

universal time - the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere

GMT, Greenwich Mean Time, Greenwich Time, UT, UT1

time - the continuum of experience in which events pass from the future through the present to the past

coordinated universal time, UTC - Greenwich Mean Time updated with leap seconds

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astronomy change of operational control coordinated universal time Earth-received time ERT GMT Greenwich Mean Time Greenwich time leap second mean time Pantochronometer SCET spacecraft event time synchronized clock time times transmission time TRM universal	And so, at exactly 23:59:59 Greenwich Mean Time (GMT) -- or Coordinated Universal Time (UTC), to the scientifically literate -- on December 31, the world's clocks will add a beat to their metronomic tick tick tock. New Year on hold: leap second makes time stand still by AFP / AFP Global Edition com (Jeevan Thankappan) The cut occurred on lines between 07:28 and 08:06 Coordinated Universal Time (UTC) on lines in the Mediterranean sea that connect Sicily to Tunisia and Egypt, the telecommunications company said. Undersea cable cuts disrupt Internet access by Network World Middle East But ships and planes carried on navigating on Universal Time, or UT1, which is also popularly known as Greenwich Mean Time. In this battle every second counts by Arab News (Jeddah, Saudi Arabia)	universal coupling Universal dial universal donor universal gas constant universal gas law universal grammar universal gravitational constant Universal instrument universal joint Universal Joint Task List Universal lever universal motor universal polar stereographic grid Universal Postal Union Universal Product Code universal proposition universal quantifier universal recipient universal resource locator Universal restoration universal set universal solvent Universal Soul universal suffrage Universal theorem universal time universal transverse mercator grid Universal umbel universal veil Universalian universalise universalism Universalist universalistic universality universalizability universalize universally Universalness universe universe of discourse Universities and Colleges Admissions Service university University City university degree university entrance University extension University of California at Berkeley University of Chicago University of Michigan University of Nebraska	Universal Task List Universal Tax Systems Inc Universal Technical Institute Universal Technical Resource Services, Inc. Universal Technical Systems, Incorporated Universal Telephone Service Assistance Program Universal Telephony Platform Universal Television Group Universal Tertiary Tuition Allowance Universal Test and Operations Physical Interface for ATM Universal Test and Operations Physical-Layer Interface for ATM Universal Test Client Universal Test Fixture Universal Test Message Universal Test Set Universal Testing Machine Universal Text Interchange Universal Text Recognizer and Converter Universal theorem Universal Therapeutic Massage Institute Universal Thermal Climate Index Universal Thread Magazine Universal Threat System for Simulators universal thunk universal time Universal Time 0 Universal Time 0 universal time 1 universal time 2 Universal Time Clock Universal Time Code Universal Time Constant Universal Time Converted Universal Time Coordinate Universal Time Coordinate Universal Time Coordinated Universal Time Coordinated Universal Time Coordinated Universal Time Corporation Universal Time Correlation Factor Universal Time Master Clock Universal Time Observed Universal Time Protocol Universal Time Standard universal time; UT1 Universal Timesharing System Universal Timesharing System for Mainframes Universal Timesharing System for Superminis Universal Timing and Polar Motion Universal Toll-Free Number Universal Tool Interface Coupling universal tooth coding system universal tooth designation system

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astronomy
change of operational control
coordinated universal time
Earth-received time
ERT
GMT
Greenwich Mean Time
Greenwich time
leap second
mean time
Pantochronometer
SCET
spacecraft event time
synchronized clock
time
times
transmission time
TRM
universal

And so, at exactly 23:59:59 Greenwich Mean Time (GMT) -- or Coordinated Universal Time (UTC), to the scientifically literate -- on December 31, the world's clocks will add a beat to their metronomic tick tick tock.

New Year on hold: leap second makes time stand still by AFP / AFP Global Edition

com (Jeevan Thankappan) The cut occurred on lines between 07:28 and 08:06 Coordinated Universal Time (UTC) on lines in the Mediterranean sea that connect Sicily to Tunisia and Egypt, the telecommunications company said.

Undersea cable cuts disrupt Internet access by Network World Middle East

But ships and planes carried on navigating on Universal Time, or UT1, which is also popularly known as Greenwich Mean Time.

In this battle every second counts by Arab News (Jeddah, Saudi Arabia)

universal coupling

Universal dial

universal donor

universal gas constant

universal gas law

universal grammar

universal gravitational constant

Universal instrument

universal joint