antichthon

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noun

A hypothetical Earth on the opposite side of the Sun.

Scrabble 18

Meanings

nounantichthon (plural antichthons)

plural antichthons · alternative Antichthon

  1. obsoleteA hypothetical Earth on the opposite side of the Sun.
    1 more example

    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

    c. 1818 (date written), Samuel Taylor Coleridge, edited by George Whalley, The Collected Works of Samuel Taylor Coleridge: Marginalia II: Camden to Hutton (Bollingen Series; LXXV), London: Routledge & Kegan Paul; Princeton, N.J.: Princeton University Press, published 1984, →ISBN, paragraph 43, page 557

    Synonyms: counter-earth

Synonyms & antonyms

nounA hypothetical Earth on the opposite side of the Sun.

Origin

  1. Ancient Greekἀντίχθων
  2. Englishantichthon

From Ancient Greek ἀντίχθων (antíkhthōn), from ἀντί (antí, “against, opposite”) + χθών (khthṓn, “Earth”).

Full word history & related roots →

Translations

Portuguese Antiterra
  • Antiterrahypothetical planet on the opposite side of the Sun
Cite this entry
APA

antichthon. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/antichthon

MLA

“antichthon.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/antichthon. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “antichthon,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/antichthon.

Source: antichthon on Wiktionary, CC BY-SA 4.0.