coordinate axis

Noun
  1. One of the fixed reference lines of a coordinate system (synset 106018245)
    is a type of: axis - a straight line through a body or figure that satisfies certain conditions
    subtypes:
    • 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
    is a part of: coordinate system, frame of reference, reference frame, reference system - a system that uses coordinates to establish position

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