ヘリコイド

noun

helicoid

A mathematical surface generated by a curve rotating and moving along an axis; also used in engineering for helical gear designs.

• ヘリコイドは微び分ぶん幾き何か学がくでよく研けん究きゅうされる曲きょく面めんの一ひとつだ。

  The helicoid is one of the surfaces often studied in differential geometry.