equinoctial
1.
(
adjective
) relating to an equinox (when the lengths or night and day are equal)
2.
(
adjective
) relating to the vicinity of the equator
3.
(
noun
) the great circle on the celestial sphere midway between the celestial poles
Synonyms:
celestial equator
,
equinoctial circle
,
equinoctial line
Related Words:
great circle
,
right ascension
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