CH3CH3; a constituent of natural and “bottled” gases.
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eth·ane 'eth-.ān,Brit 'ē-.thān n a colorless odorless gaseous alkane C2H6 found in natural gas and used esp. as a fuel
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eth·ane (ethґān) a hydrocarbon of the methane series, C2H6, forming a constituent of natural gas, which occurs as a colorless, odorless, flammable gas.Medical dictionary. 2011.