ferrofluid(redirected from Ferro fluid)
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A liquid that consists of a colloidal suspension of ferromagnetic particles and that becomes strongly polarized in the presence of a magnetic field. Ferrofluids do not retain the polarization once the magnetic field is removed.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.