ryanodine
noun
ry·an·o·dine
rīˈanəˌdēn,
-də̇n
plural -s
: a crystalline insecticidal alkaloid C25H35NO9 that is toxic to mammals and is obtained from the root and stem of the ryania
Word History
Etymology
irregular from New Latin Ryania (genus name of Ryania speciosa) + English -ine
First Known Use
1948, in the meaning defined above