Pyrazine Pyr"a*zine, n. Also -zin -zin . [Pyridine + Gr. ? not + ? life.] (Org. Chem.) A feebly basic solid, {C4H4N2}, obtained by distilling piperazine with zinc dust, and in other ways. Also, by extension, any of various derivatives of the same. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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