同どう心しん円えん

noun

concentric circles

Refers to circles sharing the same center. Often used in geometry, design, and metaphorical contexts.

• 池いけに石いしを投なげると、同どう心しん円えんが広ひろがった。

  When I threw a stone into the pond, concentric circles spread out.

• この図ず形けいは同どう心しん円えんで構こう成せいされている。

  This figure is composed of concentric circles.