Definition

Noun: - The third axis in a three-dimensional coordinate system: In a standard three-dimensional Cartesian coordinate system, the z-axis is typically the vertical axis, representing depth or height, while the x-axis and y-axis represent the horizontal plane. It is perpendicular to both the x-axis and y-axis.

Usage Examples

• Noun:
  • In this graph, the z-axis represents time, while the x and y axes show spatial coordinates.
  • To find the point's location in 3D space, you need its coordinates along the x-axis, y-axis, and z-axis.
  • The model extends five units along the positive z-axis.

Advanced Usage

• "Along the z-axis": Describing movement or measurement parallel to this axis.
  • The force is applied primarily along the z-axis.
• "z-axis direction": Referring to the orientation or vector of this axis.
  • Rotate the object 90 degrees around the z-axis.

Variants and Related Words

• Axis (n): A reference line in a coordinate system.
• X-axis (n): The first or horizontal axis in a coordinate system.
• Y-axis (n): The second or vertical axis in a two-dimensional system, or the second horizontal axis in a 3D system.
• Coordinate system (n): A system that uses one or more numbers, or coordinates, to uniquely determine the position of a point.

Synonyms

• Vertical axis (in many standard orientations)
• Depth axis (in certain contexts, like computer graphics)

Related Phrases

(Note: As a technical term, 'z-axis' does not have phrasal verbs or idioms in the conventional sense. Its usage is primarily in mathematical, scientific, and technical contexts.)

Noun

1. the third axis in a 3-dimensional coordinate system