WordNet
inertial frame
n. a coordinate system in which Newton's first law of motion is valid [syn: inertial reference frame]
Usage examples of "inertial frame".
Time intervals and lengths measured by an observer in one inertial frame, when transformed to another frame, needed to be modified by a factor that depended on the relative motion between them.
Let's run the same experiment, letting B free-fall in its inertial frame down to the ground.
The speed of light must be the same in any inertial frame of reference.
Definitely Wizard manufacture, about half a million years old in our current inertial frame.