中等左圆括号装饰 ❨

Round parenthesis appeared back in the 16th century, when more complex mathematical operations started to require new signs. At first, this symbol was spread in STEM (Science, Technology, Engineering, and Mathematics), then it moved on and appeared in writing and programming languages. Nowadays you can easily find it in physical and chemical formulas, books and texts of any genre, and, of course, in smiles like :)

The middle left bracket from Unicode is usually the opening one, used in conjunction with the right one — ❩ . Among the dingbats there are other brackets, for example, bold ❪ , ❫ or panzer-like, with two breaks — ❲ , ❳ .

符号 「中等左圆括号装饰」 包含在 「印刷符号」 块的 「觀賞括號」 子块中，并在2002年作为Unicode版本3.2的一部分获得批准。