| 单词 | ether |
| 释义 | ether n. 1. Chem. a a colourless volatile organic liquid used as an anaesthetic or solvent. Also called DIETHYL ETHER, ETHOXYETHANE. Usage Chem. formula: C2H5OC2H5 b any of a class of organic compounds with a similar structure to this, having an oxygen joined to two alkyl etc. groups. 2. a clear sky; the upper regions of air beyond the clouds. 3. hist. a a medium formerly assumed to permeate space and fill the interstices between particles of matter. b a medium through which electromagnetic waves were formerly thought to be transmitted. Derivatives etheric adj. Etymology: ME f. OF ether or L aether f. Gk aither f. root of aitho burn, shine |
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