真しん円えん度ど

noun

circularity; roundness

Technical term used in engineering, manufacturing, and metrology to describe how close a shape is to a perfect circle. Often measured as a tolerance.

• この部ぶ品ひんの真しん円えん度どは百ひゃく分ぶんの一いちミリメートル以い内ないに収おさまっている。

  The circularity of this part is within 0.01 mm.

• 真しん円えん度ど測そく定てい器きを使つかって、加か工こう後ごの円えん筒とうの真しん円えん度どを確かく認にんした。

  We checked the roundness of the machined cylinder using a circularity measuring instrument.