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

• equinoctial point

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

• astronomy
• uranology

1. (noun) 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

• autumnal equinox
• fall equinox
• september equinox
• march equinox
• spring equinox
• vernal equinox

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

• autumnal equinox
• vernal equinox

1. (noun) 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

• cosmic time

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

• celestial point

1. (noun) 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

• equinoctial