methysergide

noun

meth·​y·​ser·​gide ˌme-thə-ˈsər-ˌjīd 

: a serotonin antagonist C₂₁H₂₇N₃O₂ used in the form of its maleate especially in the treatment and prevention of migraine headaches

Word History

Etymology

methyl + lysergic acid + amide

First Known Use

1962, in the meaning defined above

Medical Definition

methysergide

noun

meth·​y·​ser·​gide ˌmeth-ə-ˈsər-ˌjīd 

: a serotonin antagonist used in the form of its maleate C₂₁H₂₇N₃O₂·C₄H₄O₄ especially in the treatment and prevention of migraine headaches