niclosamide
/nɪˈkləʊsəmʌɪd/Pharmacology
noun
An anthelmintic drug used to treat tapeworm infestations in humans and other mammals and also as a molluscicide; 2′,5-dichloro-4′-nitrosalicylanilide, C13H8Cl2N2O4.
Origin
1960s; earliest use found in The Lancet. From ni- (in nitro-) + -clo- (apparently representing chloro-) + -sa- + amide, elements in the chemical name.