×，万国码 U+00D7，名称为「乘号」，亦称作「叉号」或「交叉」。有以下的可能用法和意思：

由于这个符号的输入不太方便，故此在日常沟通时一般用英文本母「x」代之。在HTML和XHTML上，则可以输入实体参引×、×或×。

The multiplication sign or times sign is the symbol ×. The symbol is similar to the lowercase letter x but is a more symmetric saltire, and has different uses. It is also known as St. Andrew's Cross and dimension sign.