ETYM French bobine; of uncertain origin; cf. Latin bombus a humming, from the noise it makes, or Irish and Gael. baban tassel, or Eng. bob.
Around which thread or tape or film or other flexible materials can be wound; SYN. spool, reel.

ETYM Of Celtic origin; cf. Gael. goil fume, rage.
1. A round shape formed by a series of concentric circles; SYN. whorl, roll, curl, curlicue, ringlet, gyre, scroll.
2. Something wound in a continuous series of loops; SYN. spiral, volute, whorl, helix.
3. Tubing that is wound in a spiral.
4. A transformer that supplies high voltage to spark plugs in a gasoline engine.
5. A spiral of insulated wire that introduces inductance into a circuit.
6. A contraceptive device placed inside a woman's womb. + prikaži više

ETYM Greek solen channel + -oid.
An electromagnetic device that converts electrical energy to mechanical movement, typically consisting of an electromagnet with a movable rod through the center.
Cylindrical wire coil acting as a magnet when charged.
A coil of wire around an iron core; becomes a magnet when current passes through the coil.
Coil of wire, usually cylindrical, in which a magnetic field is created by passing an electric current through it (see electromagnet). This field can be used to move an iron rod placed on its axis.
Mechanical valves attached to the rod can be operated by switching the current on or off, so converting electrical energy into mechanical energy. Solenoids are used to relay energy from the battery of an automobile to the starter motor by means of the ignition switch.
Tubular coil of wire producing magnetic field. + prikaži više