The Collaborative International Dictionary
Antichthon
Antichthon \An*tich"thon\, n.; pl. Antichthones. [Gr. ?; ? against + ? the earth.]
A hypothetical earth counter to ours, or on the opposite side of the sun.
--Grote.pl. Inhabitants of opposite hemispheres.
--Whewell.
Wiktionary
antichthon
n. (context obsolete English) A hypothetical Earth on the opposite side of the Sun.
Wikipedia
Antichthon
Antichthon is the peer-reviewed academic journal of the Australasian Society for Classical Studies. The focus of the journal is ancient Greece and Rome, however, its scope is broadly defined so as to embrace the ancient Near East and the Mediterranean from the beginnings of civilisation to the Early Middle Ages.