ジエチルエーテルMeanings1noundiethyl etherA volatile, highly flammable organic solvent used in laboratories and historically as an anesthetic. Technical term.See also: エーテルジエチルエーテルは引いん火か性せいが高たかいので、取とり扱あつかいに注ちゅう意いが必ひつ要ようです。Diethyl ether is highly flammable, so careful handling is required.