ˌre.trōˈnēˌsēn, -_sə̇n sometimes ˌrē.t- noun
( -s )
Etymology: retro rsine + se nec ion ine
: a crystalline amino dihydroxy bicyclic alcohol C 8 H 13 NO 2 derived from pyrrole and formed by hydrolysis of various alkaloids (as senecionine or monocrotaline)