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solenoid (n.)

"coil of insulated wire carrying an electrical current and having magnetic properties," 1827, from French solénoïde, from Greek sōlēnoeidēs "pipe-shaped," from sōlēn "pipe, channel" + combining form of eidos "form, shape" (see -oid). Related: Solenoidal.

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Definitions of solenoid from WordNet

solenoid (n.)
a coil of wire around an iron core; becomes a magnet when current passes through the coil;
From wordnet.princeton.edu