'Heptane' definitions:
Definition of 'heptane'
(from WordNet)
noun
A colorless volatile highly flammable liquid obtained from petroleum and used as an anesthetic or a solvent or in determining octane ratings
Definition of 'Heptane'
From: GCIDE
- 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]