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equinoctial

[ee-kwuh-nok-shuh l, ek-wuh-] /ˌi kwəˈnɒk ʃəl, ˌɛk wə-/
adjective
1.
pertaining to an equinox or the equinoxes, or to the equality of day and night.
2.
pertaining to the celestial equator.
3.
occurring at or about the time of an equinox.
4.
Botany. (of a flower) opening regularly at a certain hour.
noun
Origin
1350-1400
1350-1400; Middle English < Latin aequinoctiālis pertaining to the equinox. See equinox, -al1
Related forms
interequinoctial, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for interequinoctial

equinoctial

/ˌiːkwɪˈnɒkʃəl/
adjective
1.
relating to or occurring at either or both equinoxes
2.
(of a plant) having flowers that open and close at specific regular times
3.
(astronomy) of or relating to the celestial equator
noun
4.
a storm or gale at or near an equinox
5.
another name for celestial equator
Word Origin
C14: from Latin aequinoctiālis concerning the equinox
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
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interequinoctial in Science
equinoctial
  (ē'kwə-nŏk'shəl, ěk'wə-)   
Adjective  
  1. Relating to an equinox.

  2. Relating to the celestial equator.


Noun  See celestial equator.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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