Meanings
nounmephenytoin (uncountable)
- uncountablemedicineAn anticonvulsant drug C₁₂H₁₄N₂O₂.
Synonyms & antonyms
nouna toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective
Similar
Mesantoin
Broader
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
From me(thyl) + pheny(l) + -toin (“hydantoin derivative”).
Full word history & related roots →Cite this entry
APA
mephenytoin. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/mephenytoin
MLA
“mephenytoin.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/mephenytoin. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “mephenytoin,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/mephenytoin.
Source: mephenytoin on Wiktionary, CC BY-SA 4.0.