直ちょっ交こう

noun, noun or participle which takes 'suru', intransitive verb, noun which may take the genitive case particle 'no'

orthogonal; perpendicular

Used in geometry, mathematics, and technical contexts to describe lines, axes, or vectors that intersect at right angles. Also used figuratively for independent or unrelated concepts.

• この二ふたつの直ちょく線せんは直ちょっ交こうしている。

  These two lines are orthogonal.

• 直ちょっ交こう座ざ標ひょう系けいを使つかうと計けい算さんが簡かん単たんになる。

  Using an orthogonal coordinate system simplifies calculations.