reluctivity[rel′ək tiv′ə tē]
reluctivity definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the ability of a substance to conduct magnetic flux, measured by the ratio of the intensity of the magnetic field to the magnetic induction of the substance: it is the reciprocal of magnetic permeability
reluctivity definition by American Heritage Dictionary
A measure of the resistance of a material to the establishment of a magnetic field within it, equal to the ratio of the intensity of the magnetic field to the magnetic induction of the material.
Origin: Blend of reluct(ance) and (conduct)ivity.