双そう曲きょく面めん

そ

う

きょ

く

め

ん

Meanings

1

noun

hyperboloid

mathematics

A quadric surface in three-dimensional space, used in geometry and related fields.

pair, set, comparison

曲bend, music, melody

面mask, face, features

楕だ円えん面めん
Ellipsoid, another type of quadric surface, while 双曲面 specifically refers to a hyperboloid.
放ほう物ぶつ面めん
Paraboloid, a different quadric surface; 双曲面 has a distinct shape with two separate sheets or one connected sheet.

Compound of 双 (そう, 'pair, double') + 曲面 (きょくめん, 'curved surface'), reflecting the two-part shape of a hyperboloid of two sheets.