Definition of allantoin in English:

allantoin

noun

Biochemistry
  • [mass noun] A crystalline compound formed in the nitrogen metabolism of many mammals (excluding primates).

    • ‘Comfrey contains allantoin, a natural substance that stimulates the growth of new skin cells.’
    • ‘The active compounds are allantoin and rosmarinic acid.’
    • ‘And he was right, since plantain contains allantoin, a proven healer of injured skin cells.’
    • ‘Formulated with glycerin and allantoin, it will also moisturize and protect any tiny cuts left by your razor.’
    • ‘Oftentimes, it is not the cortisol stimulating properties which are cited for their healing properties but some other biochemical agent such as allantoin in comfrey.’

Origin

Mid 19th century: from allantois (because it was discovered in the allantoic fluid of cows) + -in.

Pronunciation:

allantoin

/əˈlantəʊɪn/