二に次じ曲きょく面めん

noun

quadric surface

Technical term in mathematics for a surface defined by a second-degree polynomial equation in three variables.

• 二に次じ曲きょく面めんの分ぶん類るいは、線せん形けい代だい数すうの重じゅう要ような応おう用ようの一ひとつです。

  The classification of quadric surfaces is one of the important applications of linear algebra.