Solenoid vs. Selenoid — What's the Difference?

A solenoid (,) is a type of electromagnet, the purpose of which is to generate a controlled magnetic field through a coil wound into a tightly packed helix. The coil can be arranged to produce a uniform magnetic field in a volume of space when an electric current is passed through it.

Crescent-shaped

A current-carrying coil of wire that acts like a magnet when a current passes through it.

Any satellite of the Earth's moon (none of which are known)

An assembly used as a switch, consisting of a coil and a metal core free to slide along the coil axis under the influence of the magnetic field.

(physics) A coil of wire that acts as a magnet when an electric current flows through it.

(engineering) An electromechanical device consisting of such a coil containing a metal core, the movement of which is controlled by the current.

(electronics) An electromechanical switch controlled by a solenoid; solenoid switch, relay.

(meteorology) The region of intersection between isobaric and isopycnal surfaces.

An electrodynamic spiral having the conjuctive wire turned back along its axis, so as to neutralize that component of the effect of the current which is due to the length of the spiral, and reduce the whole effect to that of a series of equal and parallel circular currents. When traversed by a current the solenoid exhibits polarity and attraction or repulsion, like a magnet.

A coil of wire around an iron core; becomes a magnet when current passes through the coil