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.

    • ‘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

/ˌrēˌtenˈtivətē//ri-/