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

etherizāˈtion or etherisāˈtion noun

eˈtherize or eˈtherise transitive verb

1. To convert into ether
2. To stupefy with ether

etheromāˈnia noun

Addiction to the taking of ether

etheromāˈniac noun

ethereal oils plural noun

Essential oils

Ethˈernet noun (computing)

A system for networking computers

ethyl /ēˈthīl or ethˈil/

1. The base (C₂H₅) of common alcohol, ether, etc
2. (Ethyl®) an antiknock compound containing lead tetraethyl Pb(C₂H₅)₄ (US)
3. Petrol using this compound (US)

ethˈylamine /-ə-mīn/ noun

A substance (NH₂C₂H₅) resembling ammonia, with one atom of hydrogen replaced by ethyl

ethˈylate transitive verb

To introduce an ethyl group into (a molecule)

ethˈylene (also ethˈene) noun

An oil-forming gas, hydrogen combined with carbon (C₂H₄)

ethyl acetate noun

An ester used in perfumes and as a solvent

ethyl alcohol noun

Ordinary alcohol

ethylene glycol noun

A thick liquid alcohol used as an antifreeze

ethyl ether see ether

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