U+22D3 "⋓" Double Union Unicode Character

U+22D3 "⋓" Double Union is a mathematical symbol that represents the binary operation of set union applied twice or in an iterated manner, often used in advanced set theory and lattice theory to denote the join of two elements within an algebraic structure, similar to how a single union (∪) combines sets, the double union emphasizes a more complex or repeated joining operation where two union operations are performed either sequentially or on distinct collections of elements.