gelsemium

noun
gel·​se·​mi·​um | \jel-ˈsē-mē-əm \

Medical Definition of gelsemium 

1 capitalized : a small genus of woody vines (family Loganiaceae) of Asia and the southern United States that include the yellow jessamine (G. sempervirens)

2 plural gelsemiums or -mia\ -​mē-​ə \ : the root of the yellow jessamine formerly used in medicine

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