residual, n.
1. A leftover quantity; a remainder.
2. (often pl.) A disability remaining after an illness, injury, or operation.
3. (usu. pl.) A fee paid to a composer or performer for each repeated broadcast (esp. on television) of a film, program, or commercial. [Cases: Copyrights and Intellectual Property 48. C.J.S. Copyrights and Intellectual Property §§ 27, 29, 33–34, 93.]