allantoin

[ uh-lan-toh-in ]

noun

, Biochemistry, Pharmacology.

1. a white powder, C 4 H 6 N 4 O 3 , produced by oxidation of uric acid and the major excretory product of purine degradation in many vertebrates: used medicinally to heal skin ulcers and in lotions, lipsticks, etc., for its soothing effect.

allantoin

/ ˌælənˈtəʊɪn /

noun

1. a substance derived from the secretions of snails and contained in some plants, used in skin care products and valued for its soothing properties

Word History and Origins

Origin of allantoin¹

1835–45; allanto(is) + -in ²; so named because it is found in the fluid of the allantois

Word History and Origins

Origin of allantoin¹

C19: from allantois