residual (
http://definr.com/residual)
adj : relating to or indicating a remainder; "residual quantity"
[syn:
residuary]
n 1: something left after other parts have been taken away;
"there was no remainder"; "he threw away the rest" [syn:
remainder,
residue,
residuum,
rest]
2: (often plural) a payment that is made to a performer or
writer or director of a television show or commercial that
is paid for every repeat showing; "he could retire on his
residuals"