Etymology
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heptane (n.)

1872; see hepta- "seven" + chemical ending -ane. So called for its 7 carbon molecules.

updated on July 04, 2015

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Definitions of heptane from WordNet

heptane (n.)
a colorless volatile highly flammable liquid obtained from petroleum and used as an anesthetic or a solvent or in determining octane ratings;
From wordnet.princeton.edu, not affiliated with etymonline.