通配符
wildcard character

定义：

A special symbol that stands for one or more characters. Many operating systems and applications support wildcards for identifying files and directories. This enables you to select multiple files with a single specification. For example, in DOS and Windows, the asterisk (*) is a wild card that stands for any combination of letters. The file specification 
m*

therefore, refers to all files that begin with m. Similarly, the specification

m*.doc

refers to all files that start with m and end with.doc.

Many word processors also support wild cards for performing text searches. 

例子： 
(wildcard characters * and ? allowed, see examples)

细分：

asterisk wildcard 星号通配符

question mark wildcard 问号通配符