orthogonal

Adjective

• having a set of mutually perpendicular axes; meeting at right angles
  • wind and sea may displace the ship's center of gravity along three orthogonal axes
    
  • a rectangular Cartesian coordinate system
    

• statistically unrelated

• not pertinent to the matter under consideration
  • an issue extraneous to the debate
    
  • the price was immaterial
    
  • mentioned several impertinent facts before finally coming to the point
    

Related words

• Synonyms: 
  rectangular , extraneous , immaterial , impertinent