Also found in: Dictionary, Encyclopedia, Wikipedia.
A substance present in allantoic fluid, fetal urine, and elsewhere; also an oxidation product of uric acid and the end product of purine metabolism in animals other than humans and the other primates.
allantoin/al·lan·to·in/ (ah-lan´to-in) a crystalline substance found in allantoic fluid, fetal urine, many plants, and produced synthetically; used topically as an astringent and keratolytic.
An oxidation product of uric acid, C4H6N4O3, found in the urine of most mammals (except humans and related primates) as the metabolic end product of purine oxidation, and also found in some plants. It is also produced synthetically and is often used in cosmetics and pharmaceuticals.
a chemical compound (5-ureidohydantoin), C4H6N4O3, that occurs as a white crystallizable substance found in many plants and in the allantoic and amniotic fluids and fetal urine of primates. It is also present in the urine of mammals other than primates as a product of purine metabolism. The substance, which can be produced synthetically by the oxidation of uric acid, was once used to promote tissue growth in the treatment of suppurating wounds and ulcers.
allantoinA drug used externally in the treatment of ACNE, usually in combination with other drugs.
allantointhe heterocyclic end product of purine catabolism in some reptiles, and mammals other than primates.
a crystalline substance, the product of purine metabolism and present in urine of most mammals except primates and Dalmation dogs, and in plants. At one time used topically to promote wound healing.