Late 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Napellin, with remodelling of the ending after -ine. Compare slightly later aconine.
Definition of napelline in US English:
napelline
nounˈnapəˌliːn
Chemistry
= aconine.
Origin
Late 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Napellin, with remodelling of the ending after -ine. Compare slightly later aconine.