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EQUINOX. The name given to two periods of the year when the days and nights are equal; that is, when the space of time between the rising and setting of the sun is one half of a natural day. Dig. 43, 13, 1, 8. Vide Day.

References in periodicals archive ?
Equinoxes - and solstices - have deep rooted cultural significance around the world, and they have been observed since time immemorial.
Saturn experiences two equinoxes per orbit, just as Earth does, when the planet's equator lines up edge-on to its orbital plane, causing the sun to appear directly over the equator.
They knew when hours of light and dark would be even: 12 of each in spring and fall equinoxes.