Descriptor may refer to:

• An identifier

Look up descriptor in Wiktionary, the free dictionary.

In computer science:

• Billing descriptor, the merchant's name that appears on a credit card statement
• Short Payment Descriptor, a compact data format for an easy exchange of a payment information using modern electronic channels
• Data descriptor, a software or hardware structure describing data
• Visual descriptors, a representation of visual features in image or video
• Security descriptor, a Windows data structure containing security information
• Segment descriptor, used for memory addressing in x86 computer architectures
• Index term, also known as a "descriptor" in information retrieval
• File descriptor, an abstract key for accessing a file

In chemistry:

• Molecular descriptor, which helps characterize a chemical compound
• Descriptor (chemistry), a prefix used to specify a chemical name

In languages:

• Epithet, a descriptive term (word or phrase), accompanying or occurring in place of a name and having entered common usage

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