Antichthon
noun ·Rare ·Advanced level
Definitions
- 1 A hypothetical Earth on the opposite side of the Sun. obsolete
"It is curious at least, that his Philosophy obliged Pythagoras, to make the Solar System #61;10, tho' his imperfect Astrognosy reduced him to the shift of including the moon, and imagining an Antiχθων ["anti-earth, anti-world"] and taking the whole as a completory Unit—Sun, Mer[cury,] Ven[us,] Earth, Moon, Mars, Jupiter, Saturn, Antichthon #61;9#43; Solar Syst[em] #61;1#61;10"
Synonyms
All synonymsExample
More examples"It is curious at least, that his Philosophy obliged Pythagoras, to make the Solar System #61;10, tho' his imperfect Astrognosy reduced him to the shift of including the moon, and imagining an Antiχθων ["anti-earth, anti-world"] and taking the whole as a completory Unit—Sun, Mer[cury,] Ven[us,] Earth, Moon, Mars, Jupiter, Saturn, Antichthon #61;9#43; Solar Syst[em] #61;1#61;10"
Etymology
From Ancient Greek ἀντίχθων (antíkhthōn), from ἀντί (antí, “against, opposite”) + χθών (khthṓn, “Earth”).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.