SOLENOID
solenoid
(noun) a coil of wire around an iron core; becomes a magnet when current passes through the coil
Source: WordNet® 3.1
Etymology
Noun
solenoid (plural solenoids)
A coil of wire that acts as a magnet when an electric current flows through it.
A mechanical switch consisting of such a coil containing a metal core, the movement of which is controlled by the current.
Anagrams
• eidolons, eidôlons
Source: Wiktionary
So"len*oid, n.Etym: [Gr. -oid.] (Elec.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition