View details and encodings for Unicode character U+22D1 Double Superset, located in the Mathematical Operators block and Math Symbol category. This character was released in 1993 under Unicode version 1.1.
⋑⋑⋑⋑U+22D1;8913\0022D1\u22D1\x{22D1}\u{22D1}u'\u22D1'