solenoid

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so·le·noid / ˈsōləˌnoid/ • n. a cylindrical coil of wire acting as a magnet when carrying electric current.DERIVATIVES: so·le·noi·dal / ˌsōləˈnoidl/ adj.ORIGIN: early 19th cent.: from French solénoïde, from Greek sōlēn ‘channel, pipe.’

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