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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

equinoctial

[‚ē·kwə′näk·shəl]
(astronomy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved