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
References in periodicals archive ?
Owens, "A set modified equinoctial orbit elements," Celestial Mechanics, vol.
The science behind this is not fully understood, but the two equinoctial periods in spring and autumn tend to produce an increase in aurora compared with winter and summer."
(37) While Martins focuses primarily on Darwin's work, such plurality is also apparent in the writing of Alexander von Humboldt, who later inspired Darwin and whose Personal Narrative of Travels to the Equinoctial Regions of the New Continent had been translated into English and was widely read in the early nineteenth century.
In turn, these variations would have been modulated by the orbital parameters equinoctial precession and eccentricity.
He attempted to identify which section of a given constellation corresponded to a textual description and, using the known rate of the equinoctial precession, calculated backwards to obtain the exact date of the observation.
Personal Narrative of a Journey to the Equinoctial Regions of the New Continent.
The first naksatra of the Vedic calendar, the Pleiades, was closest to the equinoctial point in 2240 B.C.E.
Figures 2(a)-2(c) show the monthly median values of [H.sub.m], hmF2, and foF2 in the F2 region for equinoctial months: March (solid line), April (gray rectangle line), September (dotted line), and October (plus line) in 1999.
This behavior departs from that in the western sector of South America, where the scintillation occurrence peaks during the equinoctial period.
1990: 250-1 shot Equinoctial won at Kelso to confound the bookies and go into the record books as the longestpriced horse ever to win a race in Britain.
"As Oman is situated at latitude of about 23.5 degrees north, the day of autumn equinox is slightly offset by a few days, the period till the Autumn Equinox are called 'Equinoctial Days'.This is due to take place on September 28.