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Na-adjective, No-adjective, Noun
1. vertical
Na-adjective, Noun, No-adjective
2. perpendicular
Wikipedia definition
3. PerpendicularIn geometry, two lines or planes (or a line and a plane) are considered perpendicular to each other if they form congruent adjacent angles (a T-shape). The term may be used as a noun or adjective. Thus, as illustrated, the line AB is the perpendicular to CD through the point B. By definition, a line is infinitely long, and strictly speaking AB and CD in this example represent line segments of two infinitely long lines.
Read “Perpendicular” on English Wikipedia
Read “垂直” on Japanese Wikipedia
Read “Perpendicular” on DBpedia

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