Autumnal equinox and Equinoctial point

Autumnal equinox noun - (astronomy) the equinoctial point that lies in the constellation of Virgo.

Equinoctial point and autumnal equinox are semantically related. In some cases you can use "Equinoctial point" instead a noun phrase "Autumnal equinox".

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

Autumnal equinox and equinoctial point are semantically related. Sometimes you can replace phrase "Autumnal equinox" with "Equinoctial point", this phrases are similar.