<p><strong>Noun</strong></p><ul><li>Astronomy: The great circle formed by the intersection of the plane of the earth's orbit with the celestial sphere; the apparent annual path of the sun in the heavens.</li><li>An analogous great circle on a terrestrial globe.</li><li>Astrology: The great circle of the ecliptic, along which are located the 12 houses and signs of the zodiac.</li></ul><p><strong>Adjective</strong></p><ul><li>Pertaining to an eclipse.</li><li>Pertaining to the ecliptic.</li></ul>