Definition of vitamin M in English:

vitamin M

noun

US
  • another term for folic acid
    • ‘Folic acid (the anion form is called folate) is a B-complex vitamin (once called vitamin M) that is important in preventing neural tube defects in the developing human fetus.’
    • ‘In addition, increase the amount of chalk and vitamin M in your diet.’
    • ‘Lettuce contains large amounts of the vitamins A, K and C and contains a little bit less vitamin M.’