柯林斯詞典electromagnet /??l?ktr???m?ɡn?t/ (electromagnets) 1. N-COUNT An electromagnet is a magnet that consists of a piece of iron or steel surrounded by a coil. The metal becomes magnetic when an electric current is passed through the coil. 電磁躰 返回 electromagnet劍橋詞典a device made from a piece of iron that becomes magnetic when a changing current is passed through the wire that goes around it 電磁鉄;電磁躰 返回 electromagnet