A family of organic compounds, each member of which contains an –O– group in its molecules. Examples are dimethyl ether (CH3OCH3) and diethyl ether (C2H5OC2H5), the latter being known simply as "ether" (see below).
Ethers are volatile, highly flammable substances made by dehydrating alcohols with sulfuric acid.
A volatile, highly flammable liquid, C4H10O, derived from distillation of ethanol with sulfuric acid, and widely used in industry and as an anesthetic. Also known as diethyl ether, ethyl ether, and ethoxyethane.
An all-pervading, infinitely elastic, massless medium formerly postulated as the medium of propagation of electromagnetic waves.