perpendicular
/ˌpɝ.pənˈdɪk.ju.lɚ/ adjective C1- At or forming a right angle (to something). · In most houses, the walls are perpendicular to the floor.
- Exactly upright; extending in a straight line toward the centre of the earth, etc.
- Independent of or irrelevant to each other; orthogonal.
From the library
After all, Count, your own exit is more likely to be perpendicular than horizontal.
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