re·main·der 
(rĭ-māndər)
(rĭ-māndər)n.
1. Something left over after other parts have been taken away.
2. Mathematics
a. The number left over when one integer is divided by another: The remainder plus the product of the quotient times the divisor equals the dividend.
b. The number obtained when one number is subtracted from another; the difference.
3. Law An estate in property that takes effect after the expiration of another estate, as where one party is given the right to occupy a property for that party's lifetime, and then another party is given the same right after the first party's death.
4. A book that remains with a publisher after sales have fallen off, usually sold at a reduced price.
tr.v. re·main·dered, re·main·der·ing, re·main·ders
To sell or dispose of as a remainder.
[Middle English, second party's right of ownership, from Anglo-Norman, from remeindre, to remain, variant of Old French remaindre, remainer; see REMAIN.]