solenoid

/ˈsɒlənɔɪd/ (bre, ipa) · /ˈsɑːlənɔɪd/ (ame, ipa) · /ˈsō-lə-ˌnȯid ˈsä-/ (ame, mw)

solenoid — noun

  • solenoidsingular
  • solenoidsplural

1. A length of conductive wire tightly wound into a spiral around a hollow tube, wh

1.名詞C2
釋義

A length of conductive wire tightly wound into a spiral around a hollow tube, which produces a magnetic field when an electric current passes through it — used in devices such as car starter motors, door locks, and industrial valves to create controlled mechanical movement.

例句

Mei watched the solenoid pull the metal rod inside the car door lock.

solenoid + pull (direct object: metal part moved by solenoid)

In the factory, the solenoid valve clicked open to release compressed air.

compound noun: solenoid valve

同義詞
  • electromagnet

    a broader category — any magnet powered by electricity; a solenoid is a specific type shaped as a cylindrical coil, often used for linear motion

  • coil

    a more general term for any wire wound into loops, not necessarily producing a magnetic field or used as an actuator

用法筆記

Commonly appears as a modifier in compound nouns such as solenoid valve, solenoid switch, and solenoid actuator. The word itself is countable — one solenoid, two solenoids.

常見錯誤

❌The solenoid magnet attracted the metal.
✅The solenoid produced a magnetic field that drew the metal core inward.
💡A solenoid is the coil assembly; the magnetic effect is produced when current flows, not a permanent magnet.