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| a gadget; dingus; thingumbob. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| heptane (hěp'tān') Pronunciation Key
A volatile, colorless, highly flammable liquid hydrocarbon obtained in the fractional distillation of petroleum. It is used as a standard in determining octane ratings (combustion characteristics), as an anesthetic, and as a solvent. Heptane is the seventh member of the alkane series. Chemical formula: C7H16. |