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ester noun

  /ˈɛstə/ , /ˈɛstɚ/
  • (organic compound) A compound most often formed by the condensation of an alcohol and an acid, with elimination of water, which contains the functional group carbon-oxygen double bond (i.e., carbonyl) joined via carbon to another oxygen atom.
 сло́жный эфи́р, эфир
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