'Hydantoin' definitions:
Definition of 'hydantoin'
From: WordNet
noun
Any of a group of anticonvulsant drugs used in treating epilepsy
Definition of 'Hydantoin'
From: GCIDE
- 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. [1913 Webster]