折おり線せん

noun

fold line; crease line

A line marked on paper, cardboard, or other material to indicate where to fold. Common in origami, packaging, and crafts.

• 折おり線せんに沿そって紙かみを折おってください。

  Please fold the paper along the fold line.

• この箱はこの折おり線せんがわかりにくい。

  The fold lines on this box are hard to see.