Definitions for equinox
ˈi kwəˌnɒks, ˈɛk wə-equinox

Princeton's WordNetRate this definition:4.4 / 9 votes

1. equinoxnoun

   either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length

2. equinoctial point, equinoxnoun

   (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic

WiktionaryRate this definition:2.0 / 1 vote

1. equinoxnoun

   The intersection of the ecliptic (apparent path of the sun) with the celestial equator.

2. Etymology: From aequinoctium, from aequus + nox.

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. EQUINOXnoun

   1.Equinoxes are the precise times in which the sun enters into the first point of Aries and Libra; for then, moving exactly under the equinoctial, he makes our days and nights equal. This he doth twice a year, about the 21st of March and 23rd of September, which therefore are called the vernal and autumnal equinoxes. John Harris

   Etymology: æquus and nox, Latin.

   It ariseth not unto Biarmia, and heliacally about the autumnal equinox. Thomas Browne, Vulgar Errours, b. iv. c. 13.

   The time when this kid was taken out of the womb was about the vernal equinox. John Ray, on the Creation.

   ’Twas now the month in which the world began,
   If March beheld the first created man;
   And since the vernal equinox, the sun
   In Aries twelve degrees or more had run. Dryden.

   2. Equality; even measure. Improper.

   Do but see his vice;
   ’Tis to his virtues a just equinox,
   The one as long as th’ other. William Shakespeare, Othello.

   3. Equinoctial wind: a poetical use.

   The passage yet was good; the wind, ’tis true,
   Was somewhat high, but that was nothing new,
   No more than usual equinoxes blew. Dryden.

WikipediaRate this definition:0.0 / 0 votes

1. Equinox

   A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September.More precisely, an equinox is traditionally defined as the time when the plane of Earth's equator passes through the geometric center of the Sun's disk. Equivalently, this is the moment when Earth's rotation axis is directly perpendicular to the Sun-Earth line, tilting neither toward nor away from the Sun. In modern times, since the Moon (and to a lesser extent the planets) causes Earth's orbit to vary slightly from a perfect ellipse, the equinox is officially defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the apparent geocentric longitude of the Sun is 0° and 180°.The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night). On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. They are not exactly equal, however, because of the angular size of the Sun, atmospheric refraction, and the rapidly changing duration of the length of day that occurs at most latitudes around the equinoxes. Long before conceiving this equality, primitive equatorial cultures noted the day when the Sun rises due east and sets due west, and indeed this happens on the day closest to the astronomically defined event. As a consequence, according to a properly constructed and aligned sundial, the daytime duration is 12 hours. In the Northern Hemisphere, the March equinox is called the vernal or spring equinox while the September equinox is called the autumnal or fall equinox. In the Southern Hemisphere, the reverse is true. During the year, equinoxes alternate with solstices. Leap years and other factors cause the dates of both events to vary slightly.Hemisphere-neutral names are northward equinox for the March equinox, indicating that at that moment the solar declination is crossing the celestial equator in a northward direction, and southward equinox for the September equinox, indicating that at that moment the solar declination is crossing the celestial equator in a southward direction.

ChatGPTRate this definition:0.0 / 0 votes

1. equinox

   An equinox is an astronomical event that occurs twice each year, typically around March 21 and September 22, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, and thus the Sun is vertically above a point on the Earth's equator. This results in almost equal hours of day and night for all locations across the planet.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Equinoxnoun

   the time when the sun enters one of the equinoctial points, that is, about March 21 and September 22. See Autumnal equinox, Vernal equinox, under Autumnal and Vernal

2. Equinoxnoun

   equinoctial wind or storm

3. Etymology: [OE. equinoxium, equenoxium, L. aequinoctium; aequus equal + nox, noctis, night: cf. F. quinoxe. See Equal, and Night.]

WikidataRate this definition:0.0 / 0 votes

1. Equinox

   An equinox occurs twice a year, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, the center of the Sun being in the same plane as the Earth's equator. The term equinox can also be used in a broader sense, meaning the date when such a passage happens. The name "equinox" is derived from the Latin aequus and nox, because around the equinox, night and day are about equal length. At an equinox the Sun is at one of two opposite points on the celestial sphere where the celestial equator and ecliptic intersect. These points of intersection are called equinoctial points: classically, the vernal point and the autumnal point. By extension, the term equinox may denote an equinoctial point. The equinoxes are the only times when the subsolar point is on the Equator. The subsolar point crosses the Equator moving northward at the March equinox and moving southward at the September equinox.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Equinox

   ē′kwi-noks, n. the time when the sun crosses the equator, making the night equal in length to the day, about 21st March and 23d Sept.—adj. Equinoc′tial, pertaining to the equinoxes, the time of the equinoxes, or to the regions about the equator.—n. a great circle in the heavens corresponding to the equator of the earth.—adv. Equinoc′tially, in the direction of the equinox.—Equinoctial gales, high gales popularly supposed to prevail about the times of the equinoxes—the belief is unsupported by observation. [L. æquus, equal, nox, noctis, night.]

Editors ContributionRate this definition:0.0 / 0 votes

1. equinoxnoun

   The equal equivalent equation uniting Christ in a imitative atmospheric way. 1.) The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (around September 22 and March 20).

   The equinox balances the earth around the equator which is equivalent to mathematics.

   Etymology: Geometry

   
   

   Submitted by Tehorah_Elyon on March 22, 2024  

Matched Categories

1. • Astronomy
   • Celestial Point
   • Cosmic Time

Anagrams for equinox »

1. oxinuqe

How to pronounce equinox?

1. Alex

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How to say equinox in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of equinox in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of equinox in Pythagorean Numerology is: 6

Examples of equinox in a Sentence

1. Daniel Flores:

   General Motors is voluntarily recalling certain 2014-2015 model year Chevrolet Equinox and GMC Terrain vehicles to replace the front windshield wiper-modules in these vehicles.

2. Steve Carlisle:

   This new investment represents a very effective way for us to meet strong demand for the Chevrolet Equinox and it's positive news for our community.

3. Soren Kisiel:

   Camp Equinox's the mission of Hidden Valley Camp, to instill in these kids a sense of community so they're working together and supporting each other, i can't imagine delivering that online.

4. Equinox Holdings:

   We want to let you know that Equinox and SoulCycle have nothing to do with the event and do not support it, as is consistent with our policies, no company profits are used to fund politicians.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=equinox
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Equinox
3. ^ Samuel Johnson's Dictionary
   https://johnsonsdictionaryonline.com/views/search.php?term=equinox
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Equinox
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/equinox
7. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=equinox
8. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=equinox