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二十面体 (nijuumentai) Japanese meaning: icosahedron | Kotomora

二に十じゅう面めん体たい

に

じゅ

う

め

ん

た

い

Meanings

1

icosahedron

A polyhedron with twenty faces. Used in geometry and related fields.

正せい二に十じゅう面めん体たいは、20枚まいの正せい三さん角

かく

形けい

で

構こう

成せい

さ

れる

。

A regular icosahedron is composed of 20 equilateral triangles.

Kanji

二two, two radical (no. 7)
十ten
面mask, face, features
体body, substance, object

Related words

正せい二に十じゅう面めん体たい
Specifically a regular icosahedron, where all faces are congruent equilateral triangles. 二十面体 is the broader term for any 20-faced polyhedron.

Word family

正せい二に十じゅう面めん体たい
regular icosahedron

Etymology

Compound of 二十 (にじゅう, 'twenty'), 面 (めん, 'face'), and 体 (たい, 'body'), literally 'twenty-faced body'. A straightforward Sino-Japanese mathematical term.