- counterearth
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/kown"teuhr errth'/, n.(in Pythagorean astronomy) a planet, out of sight from our part of the earth, whose shadow upon the sun and moon, cast by a central fire that is also out of sight, causes the eclipses. Also called antichthon.[1855-60; COUNTER- + EARTH, as trans. of Gk antíchthon]
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Universalium. 2010.