Lactic acid

//ˈlæktɪk ˈæsɪd// noun

Definitions

Noun
  1. 1
    2-Hydroxypropanoic acid (CH₃CHOHCO₂H), a syrupy liquid, soluble in water; found in milk, wine and many fruits; used as a food additive and in many industrial applications. countable, uncountable

    "It was [Roger] Federer's ability to pull him around the court that put the lactic acid and debilitating weight in those legs and he should not have been allowed the luxury of his trainer's help."

  2. 2
    a clear odorless hygroscopic syrupy carboxylic acid found in sour milk and in many fruits wordnet

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