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Definition of Vernal equinox

Vernal equinox Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

vernal equinox
n
1. march 21 [syn: march equinox, spring equinox]
[ant: autumnal equinox ]

2. (astronomy) the equinoctial point that lies in the constellation of pisces
vernal equinox
(astron.), the time when the sun crosses the equator when proceeding northward...
see vernal

WordNet 2.0

Noun
1. March 21
(synonym) March equinox, spring equinox
(antonym) autumnal equinox, September equinox, fall equinox
(hypernym) equinox
(hyponym) Noruz, Nowruz, Nowrooz
(part-holonym) spring, springtime
2. (astronomy) the equinoctial point that lies in the constellation of Pisces
(hypernym) equinoctial point, equinox
(classification) astronomy, uranology
Vernal equinox Definition from Science & Technology Dictionaries & Glossaries
WEATHER&METEOROLOGY
Taking place in the Northern Hemispheric spring, it is the point at which the ecliptic intersects the celestial equator. Days and nights are most nearly equal in duration. It falls on or about March 20 and is considered the beginning of spring in the Northern Hemisphere and autumn in the Southern Hemisphere. It is the astronomical opposite of the autumnal equinox.
Astronomy and Physics Terms by ExploreSpace.com
The Sun's position on the celestial sphere about March 21; at this time the sun's path on the ecliptic crosses the celestial equator. Alsoknown as first point of Aries; March equinox; spring equinox
Vernal equinox Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
An equinox is an astronomical event in which the plane of Earth's equator passes the center of the Sun, making night and day of approximately equal length all over the planet. The equinoxes are the only times when the solar terminator (the "edge" between night and day) is perpendicular to the equator. As a result, the northern and southern hemispheres are equally illuminated.

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The March equinox or Northward equinox is the equinox on the earth when the Sun appears to cross the celestial equator, heading northward. The March equinox is the vernal equinox in the northern hemisphere and the autumnal equinox in the southern hemisphere.

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Vernal equinox Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
ka-wak-gad t'kastik-wak
Vernal equinox Definition from Religion & Spirituality Dictionaries & Glossaries
Rakefet
Seasons The seasons are at least in part due to the inclination of the earth's axis, and wholly according to this explanation in modern astronomy. If there were no inclination -- if the ecliptic coincided with the equator, and the earth's axis with the poles of the equator -- there would be no seasons. In satya yuga there were no changes of season, but an eternal spring which lasted as long as the lack of polar inclination endured, but which came to an end when the third root-race fell into "sin" -- the two events coinciding. The earth's axis when without inclination is at right angles with the plane of the ecliptic. The titans or kabiri are described in The Secret Doctrine as the generators and regulators of the seasons, thus showing that they take their part with the karmic lipikas in the cosmic history of the globe. Spring, summer, autumn, and winter correspond with other quaternaries, such as the four points of the compass and the four elements; and also represent a cycle of changes from birth to dissolution and rebirth.
In theosophical literature the earth's axis is said to undergo a secular movement of inclination with interims of pausings and smaller changes, or what may be called librations; and this secular movement is on the whole continuous, so that in course of long ages the axis of the earth becomes inverted, and consequently the poles are reversed; continuing their movement, they finally return to the position of right angularity with the plane of the ecliptic.
to be continue "Seasons2 "
Glossary of Astrological Terms
Spring Equinox (northern hemisphere). The first degree of Aries, the beginning of the astrological year.