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isobutane
[ ahy-suh-byoo-teyn, -byoo-teyn ]
/ ˌaɪ səˈbyu teɪn, -byuˈteɪn /
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noun Chemistry.
a colorless, flammable gas, C4H10, used as a fuel, as a refrigerant, and in the manufacture of gasoline by alkylation.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023