| inertial reference | 0.39 | Your clocks are equally valid only if you each continue to occupy an inertial reference frame. | ||
| inertial confinement | 0.33 | In inertial confinement, lasers do the work in a split-second implosion. | ||
| inertial measurement | 0.33 | The problem with the navigation unit, called an inertial measurement unit, developed on Wednesday afternoon. |