retrorsine
noun
re·tror·sine
rə̇‧ˈtrȯrˌsēn,
-sə̇n
plural -s
: a poisonous crystalline alkaloid C18H25NO6 found in various plants of the genus Senecio (as S. retrorsus)
Word History
Etymology
New Latin retrorsus (specific epithet of Senecio retrorsus) (from Latin, bent backwards) + English -ine