Meanings
nounphenytoin (uncountable)
- uncountablemedicineA synthetic compound related to hydantoin, used as an anticonvulsant in the treatment of epilepsy.
Synonyms & antonyms
nounan anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative
Similar
diphenylhydantoinDilantin
Broader
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Contraction of diphenylhydantoin.
Full word history & related roots →Cite this entry
APA
phenytoin. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/phenytoin
MLA
“phenytoin.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/phenytoin. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “phenytoin,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/phenytoin.
Source: phenytoin on Wiktionary, CC BY-SA 4.0.