ether /ēˈthər/

1. The clear, upper air
2. A medium, not matter, assumed in the 19c to fill all space and transmit electromagnetic waves (in these senses also aether)
3. (specif ethyl ether or diethyl ether) a colourless, transparent, volatile liquid (C₂H₅OC₂H₅) of great mobility and high refractive power, used as a solvent, an anaesthetic, and in the preparation of explosives
4. Extended to the class of compounds in which two alkyl or other groups are united with an oxygen atom

ethēˈreal or ethēˈrial adjective

1. Consisting of ether
2. Heavenly
3. Airy
4. Spirit-like

ethērealˈity noun

ethērealizāˈtion or ethērealisāˈtion noun

ethēˈrealize or ethēˈrealise transitive verb

1. To convert into ether, or the fluid ether
2. To render spirit-like

ethēˈreally adverb

ethēˈreous (Milton), etheric /ē-therˈik/ or etherˈical adjective

Ethereal

etherificāˈtion /-ther-/ noun

etherify transitive verb

To convert into ether

ethēˈrion noun

A very light gas once supposed to exist in air

eˈtherism noun

1. The condition induced by using ether
2. Addiction to the taking of ether

eˈtherist noun

Someone who takes or who administers ether

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