noun. An organic compound, especially ethane, containing two methyl groups.

noun. Same as ethane.

noun. A combining form used in organic chemistry to indicate the presence of two methyl-groups in the molecule of a compound.

noun. Ethane; -- sometimes so called because regarded as consisting of two methyl radicals. See ethane.

noun. (in combination) Two methyl groups in a molecule.

""We were looking to make a commercially viable 'cool-off' product, and came across a cooling substance called dimethyl ether," says Hiroya Iida , an operations representative at Iida."