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English *noun*: reference frame
1.	reference frame (cognition) a system that uses coordinates to establish position
		Synonyms	coordinate system, frame of reference, reference system
		Broader (hypernym)	arrangement, organisation, organization, system
		Narrower (hyponym)	Cartesian coordinate system, inertial frame, inertial reference frame, space-time, space-time continuum
		Part holonym	coordinate axis