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coordinated universal time

noun
1.
Greenwich Time that is adjusted to minimize its divergence from international atomic time.
Abbreviation: UTC.
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Based on the Random House Dictionary, © Random House, Inc. 2016.
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coordinated-universal-time in Science
coordinated universal time
  (kō-ôr'dn-ā'tĭd)   
A highly accurate time scale based on time measured by an atomic clock. Because coordinated universal time is unaffected by the gradual slowing of Earth's rotation, leap seconds are added as needed to synchronize it with the sidereal (rotation-based) universal time. Coordinated universal time is used internationally for scientific and technical purposes. Compare universal time.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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