凸とつ型がた

noun, noun which may take the genitive case particle 'no'

convex shape; convexity

Describes a shape that bulges outward, like a dome or a lens. Often used in technical or descriptive contexts.

• このレンズは凸とつ型がたになっている。

  This lens has a convex shape.

• 凸とつ型がたの鏡かがみを使つかうと、広ひろい範はん囲いが見みえる。

  Using a convex mirror lets you see a wide area.