equinoctial

• 过时的形容词，指与春分或秋分（昼夜平分点）有关的，或发生在二分时刻的；现代英语中很少使用。

An archaic adjective relating to the equinox or the time of the equinox; now rarely used in modern English.

1. Relating to the equatorC2formal

   Pertaining to or situated near the Earth's equator.

   赤道的

   • The equinoctial regions experience a warm climate year-round.
   • Equinoctial currents flow along the equatorial belt.
   • The ship sailed through equinoctial waters.

   同义词equatorial

   反义词polar

2. Relating to an equinoxC2formal

   Associated with the time of year when day and night are of equal length.

   春分或秋分的

   • The equinoctial storms are common in March and September.
   • Ancient cultures celebrated equinoctial festivals.
   • The equinoctial point marks the sun's position during the equinox.

• 名词，指天球上距天极等距的大圆，即天赤道，又称二分圈。

A noun referring to the great circle on the celestial sphere that is equidistant from the celestial poles, also known as the celestial equator.

1. Celestial EquatorC2formal

   The great circle on the celestial sphere that lies midway between the celestial poles, marking the projection of Earth's equator into space.

   天赤道

   • The equinoctial is used as a reference for mapping stars.
   • Astronomers measure declination from the equinoctial.
   • The sun crosses the equinoctial during the equinoxes.

   同义词celestial equatorequinoctial circleequinoctial line