sidereal time Hear it!

sidereal time definition

sidereal time

  1. time measured by the sidereal day: it is divided into the sidereal hour ( of a sidereal day), the sidereal minute ( of a sidereal hour), and the sidereal second ( of a sidereal minute)
  2. the hour angle of the vernal equinox

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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