allantoin

[ uh-lan-toh-in ]
/ əˈlæn toʊ ɪn /

noun Biochemistry, Pharmacology.

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.

Origin of allantoin

1835–45; allanto(is) + -in2; so named because it is found in the fluid of the allantois

British Dictionary definitions for allantoin

allantoin
/ (ˌælənˈtəʊɪn) /

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

Word Origin for allantoin

C19: from allantois

Medical definitions for allantoin

allantoin
[ ə-lăntō-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.