Allantoin



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

allantoin al·lan·to·in (ə-lān’tō-ĭn)
n.

A substance present in allantoic fluid, amniotic fluid, and fetal urine.

A crystalline oxidation product of uric acid produced in vertebrate purine metabolism and used medicinally to promote tissue growth.

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