reference frame

noun Physics.
frame of reference ( def 2 ).

Origin:
1920–25

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Science Dictionary
reference frame   (rěf'ər-əns)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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00:10
Reference frame is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a stew of meat, vegetables, potatoes, etc.
Example sentences
The first one is the reference frame for climate anomaly.
Since the two photons are traveling in the same reference frame, all of their events share simultaneity.
By this he means shorter than the distance measured in the reference frame on the ground.
The reference frame would be at the equator because it is rotating.
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