re·ser·pine 
(r
ĭ-sûr
p
ēn
′, -p
ĭn, r
ĕs
ər-p
ĭn, -p
ēn
′, r
ĕz
-)
n. A drug, C33H40N2O9, isolated from the roots of certain species of rauwolfia and used as an antihypertensive.
[German Reserpin, from shortening and alteration of New Latin Rauvolfia serpentīna, species of snakeroot : RAUWOLFIA + Late Latin serpentīna, feminine of serpentīnus, serpentine; see SERPENTINE.]