Definition of retentivity in English:

retentivity

noun

Physics
  • The ability of a substance to retain or resist magnetization, frequently measured as the strength of the magnetic field that remains in a sample after removal of an inducing field.

    ‘iron is easily magnetized but has low retentivity’
    count noun ‘a retentivity of about 10,000 gauss’
    • ‘Note that residual magnetism and retentivity are the same when the material has been magnetized to the saturation point.’
    • ‘Another serious problem concerning erase heads used in conjunction with record/write heads is that of magnetic retentivity.’

Pronunciation

retentivity

/ˌriːtɛnˈtɪvɪti/