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equinoctial

PRIMARY MEANINGS OF: equinoctial

1
 adj
relating to an equinox (when the lengths of night and day are equal)
2
 nadj
the great circle on the celestial sphere midway between the celestial poles
relating to the vicinity of the equator
FULL DEFINITIONS OF: equinoctial
1

adj relating to an equinox (when the lengths of night and day are equal)

2

n the great circle on the celestial sphere midway between the celestial poles

Synonyms:
celestial equator, equinoctial circle, equinoctial line
Type of:
great circle
a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center

adj relating to the vicinity of the equator

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