helleboretin
/hɛlɪˈbɔːrɪtɪn/Chemistry. Now rare
noun
A toxic alkaloid which is the aglycone of helleborein.
Origin
Late 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Helleboretin from Helleborein with insertion of -t-, after -etin.