from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A prodrug that is metabolized to phenytoin and administered parenterally for the treatment of seizures.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A water-soluble phenytoin prodrug used only in hospitals for the treatment of epileptic seizures.
Alteration of phos(phorus) + phenytoin.(American Heritage® Dictionary of the English Language, Fourth Edition)