D defs.my
Entry 2 senses Webster, 1913

Demagnetize

· De·mag·net·ize · IPA
01 v. t. To deprive of magnetic properties; to render nonmagnetic. See Magnetize.
  1. 1.
    To deprive of magnetic properties; to render nonmagnetic. See Magnetize. See: Magnetize
    “If the bar be rapidly magnetized and demagnetized.” — Am. Cyc.
  2. 2.
    To free from mesmeric influence; to demesmerize.[archaic]