Meaning & use
Equinoctial
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Relating to an equinox, the time when day and night are of nearly equal length.
See it in a sentence
The equinoctial storms of late September are known for battering the coast.
Astronomers tracked the sun's position as it crossed the equinoctial line.
A note on using this word
Equinoctial comes from the Latin aequus ('equal') and nox ('night'), the same roots that give us 'equinox' itself.
Words with a similar meaning
equinox-related
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Another way to use it
2. noun
The celestial equator, especially as used in older astronomical and nautical texts.
Sailors once used the equinoctial to help calculate their position at sea.
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