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equinox
[ ee-kwuh-noks, ek-wuh- ]
noun
- the time when the sun crosses the plane of the earth's equator, making night and day of approximately equal length all over the earth and occurring about March 21 vernal equinox, or spring equinox and September 22 autumnal equinox.
- either of the equinoctial points.
equinox
/ ˈɛkwɪˌnɒks; ˈiːkwɪˌnɒks /
noun
- either of the two occasions, six months apart, when day and night are of equal length See vernal equinox autumnal equinox
- another name for equinoctial point
equinox
/ ē′kwə-nŏks′ /
- Either of the two points on the celestial sphere where the ecliptic (the apparent path of the Sun) crosses the celestial equator .
- ◆ The point at which the Sun's path crosses the celestial equator moving from south to north is called the vernal equinox . The vernal equinox marks the zero point in both the equatorial and ecliptic coordinate systems; horizontal angular distances (right ascension in the equatorial system and celestial longitude in the ecliptic system) are measured eastward from this point. The vernal equinox is also known as the first point of Aries because when first devised some 2,000 years ago this point occurred at the beginning of Aries in the zodiac. Because of the westward precession of the equinoxes, the vernal equinox is now located at the beginning of Pisces.
- ◆ The point at which the Sun's path crosses the celestial equator moving from north to south is called the autumnal equinox .
- Either of the two corresponding moments of the year when the Sun is directly above the Earth's equator. The vernal equinox occurs on March 20 or 21 and the autumnal equinox on September 22 or 23, marking the beginning of spring and autumn, respectively, in the Northern Hemisphere (and the reverse in the Southern Hemisphere). The days on which an equinox falls have about equal periods of sunlight and darkness.
- Compare solstice
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Word History and Origins
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Word History and Origins
Origin of equinox1
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Example Sentences
For a while yoga and pilates classes were sought out at luxury gyms like Equinox.
Their physical footprint is smaller than a traditional Equinox or Crunch Fitness gym -- between 3,000 to 8,000 square feet.
Luxury fitness giant Equinox, which acquired SoulCycle in 2011, runs on the same model.
He'll describe a bank of stationary cyclists in the window of a New York Sports Club, then the same again in an Equinox.
Led by strong sales of such models as the Chevy Equinox, GM has increased its U.S. market share by 13 percent so far this year.
But, before the equinox, disease began to make fearful havoc in the little community.
The equinox of outraged earth shall blaze And flash its levin on your infamous might.
As the days went by and the equinox drew near, auroral phenomena were with few exceptions visible on clear evenings.
The equinox arrived, and the only indication of settled weather was a more marked regularity in the winds.
The season meanwhile was drawing onward to the equinox, and though it was still fine, the days were much shorter.
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