arecoline
noun
arec·o·line ə-ˈre-kə-ˌlēn 
: a toxic parasympathomimetic alkaloid C8H13NO2 that is used as a veterinary anthelmintic and occurs naturally in betel nuts
Example Sentences
Recent Examples on the Web From teenagers to elderly mah-jong players, the city’s residents chomp furiously to get their fix of the nut’s main stimulant, arecoline. 
The Economist, 3 Oct. 2020
The Economist, 3 Oct. 2020 Word History
Etymology
International Scientific Vocabulary areca + -ol entry 1 + -ine entry 2
First Known Use
1889, in the meaning defined above
Medical Definition
arecoline
noun
arec·o·line ə-ˈrek-ə-ˌlēn
: a toxic parasympathomimetic alkaloid C8H13NO2 that is used as a veterinary anthelmintic and occurs naturally in betel nuts