identifiers

n. one who identifies; one who associates himself with a particular cause or idea

Identifiers (IDs) are lexical tokens that name entities. The concept is analogous to that of a "name". Identifiers are used extensively in virtually all information processing systems. Naming entities makes it possible to refer to them, which is essential for any kind of symbolic processing.
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Noun
1. a symbol that establishes the identity of the one bearing it
(hypernym) symbol

IDENTIFICATORI. IDENTIFICATRICI