| equinoctial | the great circle on the celestial sphere midway between the celestial poles |
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| equinoctial | relating to an equinox (when the lengths or night and day are equal) |
| equinoctial | relating to the vicinity of the equator |
| equinoctial | the great circle on the celestial sphere midway between the celestial poles |
| equinoctial | the great circle on the celestial sphere midway between the celestial poles |
| equinoctial | (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic |
| equinoctial | a violent rainstorm near the time of an equinox |
| equinoctial | the time for the earth to make one revolution around the sun, measured between two vernal equinoxes |