ethane

[eth-eyn]
noun Chemistry.
a colorless, odorless, flammable gas, C 2 H 6 , of the methane series, present in natural gas, illuminating gas, and crude petroleum: used chiefly in organic synthesis and as a fuel gas.
Also called dimethyl.


Origin:
1870–75; eth(yl) + -ane

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World English Dictionary
ethane (ˈiːθeɪn, ˈɛθ-)
 
n
a colourless odourless flammable gaseous alkane obtained from natural gas and petroleum: used as a fuel and in the manufacture of organic chemicals. Formula: C2H6
 
[C19: from eth(yl) + -ane]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
ethane   (ěth'ān')  Pronunciation Key 
A colorless, odorless, flammable gas occurring in natural gas. It is used as a fuel and in refrigeration. Ethane is the second member of the alkane series. Chemical formula: C2H6.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

ethane

a colourless, odourless, gaseous hydrocarbon (compound of hydrogen and carbon), belonging to the paraffin series; its chemical formula is C2H6. Ethane is structurally the simplest hydrocarbon that contains a single carbon-carbon bond. The second most important constituent of natural gas, it also occurs dissolved in petroleum oils and as a by-product of oil refinery operations and of the carbonization of coal.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The trouble is that the ethane route to making ethylene produces virtually no
  propylene.
The inner envelope holds helium in the head section of the blimp and an ethane
  fuel gas in the three tail sections.
In fact, the team found ethane, methane and ethylene in spring water located
  near the oracle.
The technology might one day wring more diesel fuel and ethane gas from
  hydrocarbon byproducts produced by oil refineries.
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