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winter solstice

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noun Astronomy.
  1. the solstice on or about December 21st that marks the beginning of winter in the Northern Hemisphere.
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Origin of winter solstice

First recorded in 1625–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for winter solstice

winter solstice

noun
  1. the time at which the sun is at its southernmost point in the sky (northernmost point in the S hemisphere) appearing at noon at its lowest altitude above the horizon. It occurs about December 22 (June 21 in the S hemisphere)
  2. astronomy the point on the celestial sphere, opposite the summer solstice, at which the ecliptic is furthest south from the celestial equator. Right ascension: 18 hours; declination: –23.5°
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

winter solstice in Science

winter solstice

[wĭntər]
  1. See under solstice.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.