Definition of "electro-magnet" [e•lec•tro-mag•net]

• A mass, usually of soft iron, but sometimes of some other magnetic metal, as nickel or cobalt, rendered temporarily magnetic by being placed within a coil of wire through which a current of electricity is passing. The metal is generally in the form of a bar, either straight, or bent into the shape of a horseshoe. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "I have a circuit breaker that hums when the dryer is running (i.e. drawing a lot of amps), but that is because it has a solenoid (based on an electro-magnet, similar to how speakers work if not exactly the same thing)."
• "By the end of the evening I hauled out a gong-sized electro-magnet in a vain attempt to pull the compass arm north."
• "He together with Dr Ian Pykett were heavily involved in the installation of our first 0.1 T electro-magnet and subsequent RF and gradient coil designs."