noun
royalty
ROY-uhl-tee/ˈrɔɪəlti/
Payment to an owner for use of that owner's property or creative work.
The author receives a royalty payment for sales of her books.

Etymology
Originally naming royal authority, royalty came to mean a sovereign’s privileges, then rights granted to others. From those rights developed the payment sense: first for using a landowner’s mine, later for using an author’s or composer’s work.
In context
He sold the rights to his AC patents to George Westinghouse for a lump sum and later tore up his royalty contract. A decision that may have cost him hundreds of millions of dollars.
More examples
- The contract specifies how royalties are calculated.
- They paid a royalty to use the patented design.
- Music royalties provided a steady income.
Forms
royalty · royalties
Similar words
- fee
- A broader charge, not necessarily linked to continuing use or sales.
- license payment
- Specifically payment for permission to use something.