token
Definitions
A physical object used as a substitute for currency or to represent a specific value or right.
A sign, symbol, or souvenir serving as evidence of something else, such as friendship or authority.
A single unit of data or a character string in a sequence, often used in computing or linguistics.
Examples
He gave her a small token of his appreciation for all her hard work.
You need to insert a plastic token into the slot to operate the machine.
The company offered a token gesture of support, but it did little to solve the underlying problem.