noun
boundary representation; B-rep
Technical term in computer graphics and CAD for representing a 3D shape by its surface boundaries.
CADソフトでは、境界表現を使って立体をモデル化することが多い。
In CAD software, solid models are often represented using boundary representation.
Compound of 境界 (boundary) and 表現 (representation), likely a calque of the English term 'boundary representation'.