名詞 equinoctial:

1. the great circle on the celestial sphere midway between the celestial poles
   同義詞：celestial equator, equinoctial circle, equinoctial line

形容詞 equinoctial:

1. relating to the vicinity of the equator
2. relating to an equinox (when the lengths or night and day are equal)

e.qui.noc.tial

adj.（形容詞）
Relating to an equinox.
二分的
Relating to the celestial equator.
與天赤道有關的
n.（名詞）
A violent storm of wind and rain occurring at or near the time of the equinox.
二分點風暴：春分或秋分或前后出現(xiàn)的暴風雨
See celestial equator
參見 celestial equator

來源：
Middle English equinoxial
中古英語 equinoxial
from Old French
源自 古法語
from Latin aequinocti3lis
源自 拉丁語 aequinocti3lis
from aequinoctium [equinox] * see equinox
源自 aequinoctium [二分點] *參見 equinox