ancestor structure
Computing term for a data structure from which another structure inherits properties, such as a parent class or prototype in object-oriented programming.
The ancestor structure of this class is the Object class.
親クラス (parent class) is a more common term in object-oriented programming; 先祖構造体 is a less frequent, more formal or technical equivalent.
Compound of 先祖 (ancestor) and 構造体 (structure), a direct translation of the English computing term 'ancestor structure'.