N-ary Square Union Operator (U+2A06) is a Unicode math symbol from the Supplemental Mathematical Operators block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class ON (other neutrals), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as ⨆ or ⨆.