noun coun·ter·earth \ˈkau̇ntər+ˌ-\

Definition of counterearth

  1. :  a planet supposed in Pythagoreanism to accompany the earth in its revolutions and to shield it from the fire at the center of the universe

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Origin and Etymology of counterearth

counter- + earth; translation of Greek antichthōn

Seen and Heard

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a brief usually trivial fact

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