Descriptor may refer to:

• An identifier

• 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

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

• Billing descriptor, the merchant's name that appears on a credit card statement

• All pages with titles containing Descriptor
• Epithet, a descriptive term (word or phrase), accompanying or occurring in place of a name and having entered common usage