The great circle midway between the celestial poles; the celestial equator.
The terrestrial equator.
Of or relating to the spring or autumnal equinox.
an equinoctial gale or storm, i.e. one happening at or near the time of the equinox, in any part of the world
Of or relating to the celestial equator.
Equatorial: Of or relating to the equator of the Earth.