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.
allantoin
al·lan·to·in ( -l n t - n)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. |
allantoin
[əlan′tō·in]
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.
allantoin
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.
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