A toxic alkaloid which is the aglycone of helleborin.
Origin
Late 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Helleboresin, apparently from Helleborin with unexplained insertion of -es-.
Definition of helleboresin in US English:
helleboresin
nounhɛlɪˈbɔːrɪsɪn
Chemistry rare
A toxic alkaloid which is the aglycone of helleborin.
Origin
Late 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Helleboresin, apparently from Helleborin with unexplained insertion of -es-.