SINCE 1828
deperm
transitive verb
de·perm
| \(ˈ)dē¦pərm\
-ed/-ing/-s
Definition of deperm
: 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
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