Definition: an Ether is an organic compound in which 2 carbon atoms are connected to an oxygen atom ( R-O-R' alkoxy group).Where R and R'represent groups such as a alkyl group
The molecule on the left (dimethyl ether) shows the ether functional group (the remaining hydrogen atoms are drawn in green for clarity).

الإيثرات مركبات عضوية تحتوي على مجموعة الإيثر كمجموعة وظيفية .

The ether group is relatively inert and therefore ethers are often used as solvents.

Diethyl Ether (or "ether") CH₃-CH₂-O-CH₂-CH₃ was widely used as an anesthetic

Some other important ethers are crown ethers which are cyclic ethers