noun
Computing term for a data structure or object that groups multiple elements into a single unit.
このデータベースでは、複数のテーブルを集成体型として扱うことができる。
In this database, multiple tables can be treated as an aggregate.
集合体 is a general term for a collection or assembly, while 集成体型 is a specific computing term for an aggregate data type.
Compound of 集成 (しゅうせい, 'collection, aggregation') and 体型 (たいけい, 'form, type'). The exact derivation is uncertain; the term is used in computing contexts.