opianine \o"pi*a*nine\, n. (Chem.) An alkaloid ({C22H23NO7}) found in small quantity in opium. It is identical with {narcotine}. It is present in amounts up to 11% in {Papaver somniferum}, and is used clinically as an antitussive. --MI11 Syn: noscapine; narcosine; opian. [1913 Webster +PJC]
Narcotine \Nar"co*tine\ (n[aum]r"k[-o]*t[i^]n or n[aum]r"k[-o]*t[=e]n), n. [Cf. F. narcotine. Cf. {Cotarnine}.] (Chem.) An alkaloid found in opium, and extracted as a white crystalline substance, tasteless and less poisonous than morphine; -- called also {narcotia}. [1913 Webster]