perpendicular
/ˌpɝ.pənˈdɪk.ju.lɚ/ noun C2- A line or plane that is perpendicular to another.
- A device such as a plumb line that is used in making or marking a perpendicular line.
Plural perpendiculars
From the library
After all, Count, your own exit is more likely to be perpendicular than horizontal.
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