orthogonal
1. [ adjective ] not pertinent to the matter under consideration
Synonyms: extraneous impertinent immaterial
Examples:

"an issue extraneous to the debate" "the price was immaterial" "mentioned several impertinent facts before finally coming to the point"

Related terms: irrelevant
2. [ adjective ] statistically unrelated
Related terms: unrelated
3. [ adjective ] having a set of mutually perpendicular axes; meeting at right angles
Synonyms: rectangular
Examples:

"wind and sea may displace the ship's center of gravity along three orthogonal axes" "a rectangular Cartesian coordinate system"

Related terms: perpendicular
Similar spelling:   orthogonality
  orthochorea
  orthicon
  Ortegon
  orthoscope