Word:

Equinox

E´qui`nox
n.1.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.
When descends on the Atlantic
The gigantic
Stormwind of the equinox.
- Longfellow.
2.Equinoctial wind or storm.
Noun1.equinox - 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.equinox - (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic

EQUINOX. The name given to two periods of the year when the days and nights are equal; that is, when the space of time between the rising and setting of the sun is one half of a natural day. Dig. 43, 13, 1, 8. Vide Day.

aphelion, apogee, astronomical longitude, autumnal equinox, celestial equator, celestial longitude, celestial meridian, circle, colures, ecliptic, equator, equinoctial, equinoctial circle, equinoctial colure, galactic longitude, geocentric longitude, geodetic longitude, great circle, heliocentric longitude, longitude, meridian, orbit, perigee, perihelion, period, small circle, solstice, solstitial colure, summer solstice, trajectory, vernal equinox, winter solstice, zodiac, zone
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Equimomental cone of a given rigid body
Equimultiple
Equinal
Equine
equine distemper
equine encephalitis
equine encephalomyelitis
Equinia
Equinoctial
equinoctial circle
Equinoctial colure
equinoctial line
equinoctial point
equinoctial storm
equinoctial year
Equinoctially
-- Equinox --
Equinumerant
Equip
Equipage
Equipaged
Equiparable
Equiparate
Equipedal
Equipendency
Equipensate
Equipment
equipment casualty
equipment failure
Equipoise
equipoised
Equipollence
Equipollent
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