Two lines that are orthogonal are perpendicular or intersecting at a right angle, like a t-square used by draftsmen.
The word orthogonal comes from the Greek orthogōnios meaning "right-angled." While this word is used to describe lines that meet at a right angle, it also describes events that are statistically independent, or do not affect one another in terms of outcome.
1 |
adj |
having a set of mutually perpendicular axes; meeting at right angles
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2 |
adj |
not pertinent to the matter under consideration
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