[uh-lan-toh-in] 
| 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. |
| al·lan·to·in (ə-lān'tō-ĭn) n. A white, crystalline oxidation product, C4H6N4O3, of uric acid that is the metabolic end product of vertebrate purine oxidation and is used medicinally to promote tissue growth. [allanto(is) + -in.] |
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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