U+29C9 "⧉" Two Joined Squares Unicode Character

U+29C9 "⧉" Two Joined Squares is a typographic symbol depicting two identical squares that are connected along one of their adjacent sides, creating a single shape composed of a left square and a right square without a gap between them. This character belongs to the Miscellaneous Mathematical Symbols-B block and is often used in mathematical notation to represent a specific relation or operation, such as concatenation or adjacency of algebraic elements. Its design can also imply combination, fusion, or a paired structure in technical diagrams or logical contexts.