solenoid

[ soh-luh-noid, sol-uh- ]

noun

1. Electricity. an electric conductor wound as a helix with small pitch, or as two or more coaxial helices, so that current through the conductor establishes a magnetic field within the conductor.
2. Also called solenoid switch. a switch controlled by such an arrangement, in which a metal rod moves when the current is turned on: used in automotive starting systems.
3. Meteorology. a space formed by the intersection of isobaric and isosteric surfaces.

solenoid

/ ˈsəʊlɪˌnɔɪd /

noun

1. a coil of wire, usually cylindrical, in which a magnetic field is set up by passing a current through it
2. a coil of wire, partially surrounding an iron core, that is made to move inside the coil by the magnetic field set up by a current: used to convert electrical to mechanical energy, as in the operation of a switch
3. such a device used as a relay, as in a motor vehicle for connecting the battery directly to the starter motor when activated by the ignition switch

solenoid

/ sō′lə-noid′ /

1. A coil of wire that acts as an electromagnet when electric current is passed through it, often used to control the motion of metal objects, such as the switch of a relay.

Derived Forms

• ˌsoleˈnoidal, adjective
• ˌsoleˈnoidally, adverb

Word History and Origins

Origin of solenoid¹

1825–35; < French solénoïde < Greek sōlḗn pipe, channel + French -oïde -oid

Word History and Origins

Origin of solenoid¹

C19: from French solénoïde, from Greek sōlēn a pipe, tube

Example Sentences

The amount the armature B is rotated will depend upon the relative effects of the pole of the solenoid and the permanent magnet G.

From Project Gutenberg

The effect can be very greatly increased by providing the solenoid with a soft-iron core.

From Project Gutenberg

It was International code—being sent as fast as the solenoid could be operated.

From Project Gutenberg

Such a low, parallel magnetic field would quite probably be found inside of a simple solenoid coil.

From Project Gutenberg

On the lower horizontal roller carrying the supply of paper is a ratchet and pawl movement, actuated by a solenoid.

From Project Gutenberg