NOUN
- (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
How To Use equinoctial point In A Sentence
- As one half of the ecliptic is north, and the other half south, of the equator, the line of intersection of their planes is at two points which are known as the equinoctial points, because, when the Sun on his upward and downward journey arrives at either of them the days and nights are of equal length all over the world. The Astronomy of Milton's 'Paradise Lost'