wallpaper group
Geology term referring to a mathematical classification of two-dimensional repeating patterns, often used in crystallography and mineralogy.
この鉱物の結晶構造は、特定の文様群に属している。
The crystal structure of this mineral belongs to a specific wallpaper group.
Compound of 文様 (pattern) and 群 (group), likely a calque of the English term 'wallpaper group'.