noun

• A carboxylic acid, obtained from retinol by oxidation and used in ointments to treat acne.

  Chemical formula: C₁₉H₂₇COOH

  ‘For the research, Stephensen exposed mouse immune-system cells, in petri dishes, to a form of vitamin A known as retinoic acid, along with a protein that mimics an infectious microbe.’

  More example sentences

  • ‘For the study, 266 long-time smokers who had kicked the habit at least one year previously were randomly assigned to receive two forms of retinoic acid - commonly known as vitamin A - or a placebo.’
  • ‘Because of the known teratogenic side effects of high-dose vitamin A, there is limited application of retinoic acid for women of reproductive age.’
  • ‘One exception is prescription retinoic acid (found in Renova and Retin-A), which has been shown to improve the appearance of newer, red stretch marks.’
  • ‘After applying retinoic acid every day for six months, only a third of users will notice moderate improvement in wrinkles or spotty discoloration.’