| NOUN | cognition | coordinate axis | one of the fixed reference lines of a coordinate system |
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| Meaning | One of the fixed reference lines of a coordinate system. | |
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| Part of | coordinate system, frame of reference, reference system, reference frame | A system that uses coordinates to establish position |
| Narrower | x-axis | The horizontal axis in a plane coordinate system |
| y-axis | The vertical axis in a plane coordinate system | |
| z-axis | The third axis in a 3-dimensional coordinate system | |
| Broader | axis | A straight line through a body or figure that satisfies certain conditions |
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