单词	carboxylic acid
释义	carboxylic acid /ˌkɑːbɒkˈsɪlɪk / noun Chemistry An organic acid containing a carboxyl group. The simplest examples are methanoic (or formic) acid and ethanoic (or acetic) acid.Formic acid belongs to the family of carboxylic acids and has the chemical formula HCOOH or HCO 2 H.... A special form of carboxylic acids are the amino acids, which are carboxylic acids that also have a nitrogen-containing group called an amine group in the molecule. Previously, researchers had found inside meteorites other organic, carbon-based compounds that play major roles in life on Earth, such as amino acids and carboxylic acids, but no sugars.
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