eth-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly; see e.g. ethoxyl n.

Origin: A variant or alteration of another lexical item. Etymon: ether n.

Etymology: < eth- (in ether n.). Compare French éth- (formations in which are found from the early 19th cent.), German eth- (formations in which are found from the first half of the 19th cent.).Attested earliest in the early 19th cent. in the French loan ethal n., and shortly afterwards in ethyl n., an adaptation from German. Formations within English are found from the mid 19th cent.

Chemistry.

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Forming names of organic compounds and radicals with the sense ‘containing, derived from, or analogous to the ethyl radical’, as ethane, ethide, ethoxyl, etc.The letter sequence eth- appears in many drug names (e.g. ethambutol, ethchlorvynol), representing ethyl (or ethylene, etc.) in the corresponding systematic name, but this generally reflects the process of contraction and rearrangement by which such names are formed, rather than the consistent use of an affix eth-.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2019).

单词	eth-
释义	eth-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly; see e.g. ethoxyl n. Origin: A variant or alteration of another lexical item. Etymon: ether n. Etymology: < eth- (in ether n.). Compare French éth- (formations in which are found from the early 19th cent.), German eth- (formations in which are found from the first half of the 19th cent.).Attested earliest in the early 19th cent. in the French loan ethal n., and shortly afterwards in ethyl n., an adaptation from German. Formations within English are found from the mid 19th cent. Chemistry. Categories » Forming names of organic compounds and radicals with the sense ‘containing, derived from, or analogous to the ethyl radical’, as ethane, ethide, ethoxyl, etc.The letter sequence eth- appears in many drug names (e.g. ethambutol, ethchlorvynol), representing ethyl (or ethylene, etc.) in the corresponding systematic name, but this generally reflects the process of contraction and rearrangement by which such names are formed, rather than the consistent use of an affix eth-. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2019). < comb. form
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