Any of a group of anticonvulsant drugs used in treating epilepsy

Wiktionary Word definitions in Wiktionary
n. (context organic compound English) The heterocycle ''imidazolidine-2,4-dione'' derived from urea and glycolic acid; any of its many derivatives

Wikipedia Word definitions in Wikipedia
Hydantoin , or glycolylurea , is a heterocyclic organic compound with the formula CHC(O)NHC(O)NH. It is a colorless solid that arises from the reaction of glycolic acid and urea . It is an oxidized derivative of imidazolidine . In a more general sense, ...

WordNet Word definitions in WordNet
n. any of a group of anticonvulsant drugs used in treating epilepsy

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hydantoin \Hy*dan"to*in\, n. [Hydrogen + allantion.] (Chem.) A derivative of urea, C3H4N2O2 , obtained from allantion, as a white, crystalline substance, with a sweetish taste; -- called also glycolyl urea .