Ferromagnetism

//ˌfɛɹoʊˈmæɡnɪtɪzm// noun

Definitions

Noun
  1. 1
    The phenomenon whereby certain substances can become permanent magnets when subjected to a magnetic field. countable, uncountable
  2. 2
    phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed wordnet

Etymology

From ferro- + magnetism.

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