etherion

E1T1H4E1R1I1O1N1

noun

A gas formerly believed to exist in air, initially identified by Charles F. Brush in 1898. He estimated that its density was one ten-thousandth of hydrogen.

OriginAncient Greek αἰθέριος →
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Meanings

nounetherion (countable and uncountable, plural etherions)

plural etherions

  1. countablehistoricaluncountableA gas formerly believed to exist in air, initially identified by Charles F. Brush in 1898. He estimated that its density was one ten-thousandth of hydrogen.

Origin

  1. Ancient Greekαἰθέριος
  2. Englishetherion

1898-12, Charles F. Brush, edited by J. Am. Chem. Soc., A new gas., volume 20, page 909: [...] it seems really probable that it not only extends far beyond the atmosphere, but fills all celestial space at a very small pressure. In recognition of this probability, I have provisionally named it aetherion or etherion, meaning “high in the heavens.” From Ancient Greek αἰθέριος (aithérios), from αἰθήρ (aithḗr, “upper heaven”).

More words from Ancient Greek

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Rhymes & wordplay

Anagrams

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Cite this entry
APA

etherion. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/etherion

MLA

“etherion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/etherion. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “etherion,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/etherion.

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