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heptane 庚烷 庚烷 heptane n 1: a colorless volatile highly flammable liquid obtained from petroleum and used as an anesthetic or a solvent or in determining octane ratings Heptane \Hep"tane\, n. [Gr. "epta` seven.] (Chem.)
Any one of several isometric hydrocarbons, {C7H16}, of the paraffin series (nine are possible, four are known); -- so called because the molecule has seven carbon atoms. Specifically, a colorless liquid, found as a constituent of petroleum, in the tar oil of cannel coal, etc. [1913 Webster]
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