Definition of lactic acid in English:

lactic acid


mass nounBiochemistry
  • A colourless syrupy organic acid formed in sour milk, and produced in the muscle tissues during strenuous exercise.

    Chemical formula: CH₃CH(OH)COOH

    • ‘Doctors may prescribe an ointment that contains urea or lactic acid to relieve symptoms.’
    • ‘Without these enzymes, lactic acid and other organic acids build up in the body.’
    • ‘The bacteria consume lactose, a complex sugar found in milk, and produce lactic acid.’
    • ‘Scheele also discovered many of what we now call organic acids, for example lactic acid in sour milk and citric, malic, and tartaric acids in fruits.’
    • ‘The effect of this is too gradually calm down the muscles but also to help the removal of lactic acid from the muscle tissues.’


lactic acid