allantoin

noun Biochemistry, Pharmacology.

1. a white powder, C4H6N4O3, 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

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

n.

1. A substance present in allantoic fluid, amniotic fluid, and fetal urine.
2. A crystalline oxidation product of uric acid produced in vertebrate purine metabolism and used medicinally to promote tissue growth.