不ふ整せい形けい

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

irregular shape; irregular form

Describes something that is not regular in shape or form; often used in technical or descriptive contexts.

• この土と地ちは不ふ整せい形けいなので、建たて物ものの設せっ計けいが難むずかしい。

  Because this land is irregularly shaped, designing a building is difficult.

• 不ふ整せい形けいな結けっ晶しょうが顕けん微び鏡きょうで観かん察さつされた。

  Irregularly shaped crystals were observed under the microscope.