a barbiturate-related substance, C15H12N2O2, used as an anticonvulsant in the treatment of grand mal epilepsy and in focal seizures.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for phenytoin
an anticonvulsant drug used in the management of epilepsy and in the treatment of abnormal heart rhythms. Formula: C 15 H 11 N 2 O 2 Na: Also called: diphenylhydantoin sodium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012