deperm
transitive verb
de·perm
(ˈ)dē¦pərm
-ed/-ing/-s
: to demagnetize partly (a ship's steel hull) as a precaution against magnetic mines by surrounding in dry dock with a large coil through which is sent an alternating current very strong at first but gradually diminishing in intensity compare degauss
Word History
Etymology
de- + permanent magnetism