What does solenoid mean?
A solenoid is an electromagnetic coil that develops a magnetic field when electric current flows through it. When fitted with a movable plunger or armature, it can convert that magnetic field into a precise mechanical action, such as opening a valve, engaging a starter, or releasing a lock. The term is common in electrical engineering, industrial automation, electronics, and vehicle repair, where solenoids are valued for their compact size, rapid response, and reliable operation. In everyday descriptions, a solenoid may be called an electromagnetic coil or simply a coil, although those terms can also be used more broadly. A solenoid differs from a permanent magnet because its magnetic effect depends on current and can therefore be switched on and off. The word also has a broader scientific history, deriving from a Greek term for a tube or channel and originally describing a coil with a tube-like form.
nounA solenoid is a coil of wire wound around a core that develops a magnetic field when electric current flows through it. In devices such as solenoid valves, locks, and starters, it converts electrical energy into mechanical force or motion.
- An electromagnetic coil that produces a magnetic field when current passes through it, especially one designed to exert mechanical force or movement.
- An electromagnetic actuator consisting of such a coil, often with a movable plunger, used in valves, locks, starters, and other mechanisms.
"A small solenoid releases the door latch when the electronic controller sends it a signal."
"The door latch is released by a small solenoid that converts the electrical signal into a mechanical pull."
"A current through the solenoid creates a magnetic field that moves the plunger's tip toward the valve opening."
The standard plural of the technical noun; it is used when referring to multiple coils or actuator devices.
"Several solenoids control the flow of water through the irrigation system."
A solenoid turns electricity into motion: one current-carrying coil can click a valve, start an engine, or unlock a door.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Words that share this root
Related word forms
How solenoid is actually used
Solenoid is primarily a technical noun used in electrical engineering, electronics, automation, and vehicle repair. It is countable and commonly appears in compound terms such as “solenoid valve” and “starter solenoid.”