HYOSCINE

scopolamine, hyoscine

(noun) an alkaloid with anticholinergic effects that is used as a sedative and to treat nausea and to dilate the pupils in ophthalmic procedures; “transdermal scopolamine is used to treat motion sickness”; “someone sedated with scopolamine has difficulty lying”

Source: WordNet® 3.1

Noun

hyoscine (countable and uncountable, plural hyoscines)

Scopolamine.

Source: Wiktionary

Hy*os"cine, n. Etym: [See Hyoscyamus.] (Chem.)

Definition: An alkaloid found with hyoscyamine (with which it is also isomeric) in henbane, and extracted as a white, amorphous, semisolid substance.

Source: Webster’s Unabridged Dictionary 1913 Edition