ether
Definition from Wiktionary, a free dictionary
See also Ether
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[edit] English
[edit] Alternative spellings
[edit] Pronunciation
- Rhymes: -iːθə(r)
[edit] Etymology
From Latin æther (“‘the upper pure, bright air’”) < Ancient Greek αἰθήρ (aithēr), “‘upper air’”) < αἴθω (aithō), “‘I burn, shine’”).
[edit] Noun
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Singular |
Plural |
ether (countable and uncountable; plural ethers)
- (organic chemistry, countable) A compound containing an oxygen atom bonded to two hydrocarbon groups.
- (organic chemistry, uncountable) Diethyl ether (C4H10O), a compound used as an early anaesthetic.
- (ancient philosophy and alchemy, uncountable) A classical physical element, considered as prevalent in the heavens and inaccessible to humans. In some versions of alchemy, this was the fifth element in addition to air, earth, fire and water.
- (archaic, physics, uncountable) A substance (aether) once thought to fill all space that allowed Electromagnetic waves to pass through it and interact with matter, without exerting any resistance to matter or energy (disproved by Einstein in his Theory of Relativity).
- (poetic or literary) The sky or heavens; the upper air.
[edit] Quotations
- For examples of the usage of this term see the citations page.
[edit] Translations
organic chemistry: a compound containing an oxygen atom bonded to two hydrocarbon groups
the fifth classic physical element
archaic: space filling substance
poetic and literary: the sky or heavens; the upper air