solenoid
Concise Oxford English Dictionary © 2008 Oxford University Press:
solenoid /ˈsɒlənɔɪd, ˈsəʊl-/
▶noun a cylindrical coil of wire acting as a magnet when carrying electric current.
– derivatives
solenoidal adjective.
solenoidal adjective.
– origin C19: from Fr. solénoïde, from Gk sōlēn ‘channel, pipe’.
'solenoid' also found in these Oxford entries:

