equinoctial

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equinoctial

1. relating to or occurring at either or both equinoxes
2. (of a plant) having flowers that open and close at specific regular times
3. Astronomy of or relating to the celestial equator
4. a storm or gale at or near an equinox
5. another name for celestial equator

equinoctial

[‚ē·kwə′näk·shəl]
(astronomy)

equinoctial

equinoctialclick for a larger image
A primary great circle of the celestial sphere formed by the intersection of the plane of the earth's equator with the celestial sphere. Also called celestial equator.