Reference-frame
noun, Physics.
1.
frame of reference (def 2).
reference frame
(rěf’ər-əns)
A basis of a four-dimensional coordinate system in which the first coordinate is understood as a time coordinate, while the other three coordinates represent spatial dimensions. Inertial frames and non-inertial frames are both examples of reference frames. Also called frame of reference. See also General Relativity, space-time, Special Relativity.
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