noun

equinox

equinox

The vernal equinox marks the start of spring.

The vernal equinox marks the start of spring.

There are two equinoxes each year.

There are two equinoxes each year.

the ((adjective)) equinox the equinox of a particular season The vernal equinox marks the start of spring.

Related concept: solstice

From Latin 'aequus' (equal) + 'nox' (night). It refers to the time when day and night are of equal length.

Remember 'equi-' for equal and 'nox' for night. 'Equal night' (and day).

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.