Meaning of allantoin in English:


Pronunciation /əˈlantəʊɪn/


mass nounBiochemistry
  • A crystalline compound formed in the nitrogen metabolism of many mammals (excluding primates).

    A cyclic compound related to hydantoin; chemical formula: C₄H₆N₄O₃

    ‘The active compounds are allantoin and rosmarinic acid.’
    • ‘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.’
    • ‘Comfrey contains allantoin, a natural substance that stimulates the growth of new skin cells.’
    • ‘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.’


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