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ecliptic -
(1) [astronomy] The great circle formed by the intersection of the plane of the earth's orbit around the sun (or apparent orbit of the sun around the earth) and the celestial sphere.
(2) [astronomy] The mean plane of the earth's orbit around the sun.
[Category=Geospatial ]
Source: esri, 08 April 2012 09:16:35, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation
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