Identifier

/ˈjuː aɪ diː/

noun — "universally unique identifier for storage or objects."

UUID, short for Universally Unique Identifier, is a standardized 128-bit identifier used in computing to uniquely identify objects, filesystems, devices, or records without requiring a central registration authority. UUIDs are designed to be unique across both space and time, ensuring that identifiers generated independently will not collide.