折おり罫けい

noun

crease (writing guide); creasing; crease line

Refers to a pre-made crease or fold line on paper, often used as a guide for writing or folding. Common in stationery and paper-craft contexts.

• この便びん箋せんには折おり罫けいが入はいっているので、まっすぐに折おれます。

  This writing paper has a crease line, so you can fold it straight.

• 折おり罫けいに沿そって手て紙がみを三みつ折おりにしてください。

  Please fold the letter in thirds along the crease lines.