• Webster's Revised Unabridged Dictionary
    • n Nicotidine (Chem) A complex, oily, nitrogenous base, isomeric with nicotine, and obtained by the reduction of certain derivatives of the pyridine group.
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Century Dictionary and Cyclopedia
    • n nicotidine A pale-yellow poisonous thick oil, C10H14N2, prepared by the action of zinc or concentrated hydrochloric acid on metadipyridyl. It boils at 287–289° C., has a strongly narcotic odor, and is found in bone-oil. Also called 3- or meta-hexahydrodipyridyl.
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Webster's Revised Unabridged Dictionary
Nicot,ine + pyridine,