Read Edit View history 并集 bìngjí union Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 并集/併集 · bìngjí · union 2026/03/04 并集 / 併集 bìngjí union union (set theory, symbol ∪) 集合A和集合B的并集记作A∪B。 verb created sense Mar 4, 2026, 02:25 AM