| 1. | the mass of a body as determined by the second law of motion from the acceleration of the body when it is subjected to a force that is not due to gravity. |
| 2. | the measure of the property of inertia. Compare Eötvös experiment, inertia (def. 2a), gravitational mass. |
| inertial mass | |
noun | |
| (physics) the mass of a body as determined by the second law of motion from the acceleration of the body when it is subjected to a force that is not due to gravity |
