identifier

A programmer-defined name for a variable, method, class or interface.

The name of an item in a program written in the Java programming language.

A legally formed name for most anything in which a computer program might be interested. Many languages (including Perl) allow identifiers that start with a letter and contain letters and digits. Perl also counts the underscore character as a valid letter. (Perl also has more complicated names, such as "qualified" names.)

A unique data string used as a key in the biometric system to name a persons identity and its associated attributes.