reference frame
Noun

A system that uses coordinates to establish position (synset 105735969)
hypernym: arrangement, organisation, organization, system  an organized structure for arranging or classifyinghyponym:
 cartesian coordinate system  a coordinate system for which the coordinates of a point are its distances from a set perpendicular lines that intersect at the origin of the system
 inertial frame, inertial reference frame  a coordinate system in which Newton's first law of motion is valid
 spacetime, spacetime continuum  the fourdimensional coordinate system (3 dimensions of space and 1 of time) in which physical events are located
part holonym: coordinate axis  one of the fixed reference lines of a coordinate system
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