醚 (mǐ) refers to a class of organic compounds known as ethers. Ethers are characterized by an oxygen atom connected to two alkyl or aryl groups. They are commonly used as solvents in various chemical reactions and are known for their relatively low reactivity compared to other organic compounds. One of the most well-known ethers is 二甲醚 (dimethyl ether), which is used as a propellant in aerosol products and as a fuel. Ethers generally have pleasant odors and are often found in natural products, making them important in both industrial applications and the fragrance industry.