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physostigmine

Syllabification: (phy·so·stig·mine)

Pronunciation: /ˌfīsōˈstigˌmēn/

Definition of physostigmine

noun

Chemistry

a compound that is the active ingredient of the Calabar bean and is used medicinally in eye drops because of its anticholinergic activity.
- A tricyclic alkaloid; chemical formula: C₁₅H₂₁N₃O₂