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noun(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
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nouneither of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal lengthtype of:
Definition that contains equinox
- summer the warmest season of the year; in the northern hemisphere it extends from the summer solstice to the autumnal equinox
- winter the coldest season of the year; in the northern hemisphere it extends from the winter solstice to the vernal equinox
- season one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions
- ram the first sign of the zodiac which the sun enters at the vernal equinox; the sun is in this sign from about March 21 to April 19
- easter a Christian celebration of the Resurrection of Christ; celebrated on the Sunday following the first full moon after the vernal equinox
- ra (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
- summertime the warmest season of the year; in the northern hemisphere it extends from the summer solstice to the autumnal equinox
- aries the first sign of the zodiac which the sun enters at the vernal equinox; the sun is in this sign from about March 21 to April 19
- wintertime the coldest season of the year; in the northern hemisphere it extends from the winter solstice to the vernal equinox
- celestial longitude (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere