Chem. [f. KET(ONE + -INE5.] An oily liquid, C6H8N2, or one of a series of homologous bases Cn H2n–4 N2 formed by the reduction of nitrosoacetone and its homologues by sodium (or tin) and hydrochloric acid.
1892. Morley & Muir, Watts’ Dict. Chem., III. 101.
