noun
area primitive
A technical term in computing, likely from computer graphics or image processing, referring to a basic output element that defines a region or area.
このグラフィックスライブラリでは、領域型出力基本要素として矩形や円が定義されている。
In this graphics library, rectangles and circles are defined as area primitives.
A compound of 領域 (area), 型 (type), 出力 (output), and 基本要素 (basic element). The exact derivation is uncertain; it is a technical term likely coined in a computing context.