Definition of malonic ester in US English:

malonic ester

noun

Chemistry
  • The diethyl ester, CH₂(COOC₂H₅)₂, of malonic acid, which is a liquid widely used in synthesis, as of carboxylic acids RR′C(COOH)₂ or RR′CHCOOH by alkylation with alkyl halides ("malonic ester synthesis").

Origin

Late 19th century; earliest use found in Chemical News.