solenoid
noun /ˈsɒlənɔɪd/, /ˈsəʊlənɔɪd/
/ˈsɑːlənɔɪd/, /ˈsəʊlənɔɪd/
(physics- a piece of wire, wound into circles, which acts as a magnet when carrying an electric current
Topics Engineeringc2螺线管(通电时产生磁场) 词源early 19th cent.: from French solénoïde, from Greek sōlēn ‘channel, pipe’.