The Collaborative International Dictionary
Lanthopine
Lanthopine \Lan"tho*pine\, n. [Gr. lanqa`nein to lie hid + E. opium.] (Chem.) An alkaloid found in opium in small quantities, and extracted as a white crystalline substance.
Wiktionary
lanthopine
n. (context organic chemistry archaic English) An alkaloid found in opium.