pharbitin
/fɑːˈbʌɪtɪn/Chemistry
noun
A glycosidal resin obtained from the seeds of a morning glory, Ipomoea (formerly Pharbitis) nil, to which their purgative properties were formerly attributed.
Origin
Late 19th century; earliest use found in The New Sydenham Society's Lexicon of Medicine and the Allied Sciences. From scientific Latin †Pharbitis, former genus name + -in.