retentivity

The quality or state of being retentive.

Capacity or power of retaining.

The capacity for a body to remain magnetized after the magnetizing field has ceased to exert an effect.

Retentiveness; specifically, in magnetism, coercive force (which see, under coercive).

The power of retaining; retentive force.

The ability to retain, potential for retention

The capacity to retain magnetism after the magnetizing action

the power of retaining liquid

the power of retaining and recalling past experience