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sol·stice(sōl′stĭs, sŏl′-, sôl′-)
Either of two times of the year when the sun is at its greatest angular distance from the celestial equator. The summer solstice in the Northern Hemisphere occurs about June 21, when the sun is at the zenith on the Tropic of Cancer; the winter solstice occurs about December 21, when the sun is at zenith on the Tropic of Capricorn. The summer solstice is the longest day of the year; the winter solstice is the shortest.
[Middle English, from Old French, from Latin sōlstitium : sōl, sun; see sāwel- in Indo-European roots + -stitium, a stoppage; see stā- in Indo-European roots.]
sol·sti′tial (-stĭsh′əl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sol•sti•tial(sɒlˈstɪʃ əl, soʊl-)
1. of or pertaining to a solstice or the solstices: a solstitial point.
2. occurring at or about the time of a solstice.
3. characteristic of the summer solstice.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.