Residue

n. remainder, rest, material that remains after part is removed; part of an estate that remains after repayment of debt and liabilities (Law)

A residue in normal English speech is a product, usually unwanted, left behind by any process.In mathematics:In complex analysis, the residue is a complex number which describes the behavior of line integrals of a meromorphic function around a singularity.In modular arithmetic, the residue of an integer n to base b is the remainder r after the largest multiple mb of b no greater than n has been subtracted from n. (If n < 0, one adds multiples of b just sufficient to make the result non-negative.) The residues modulo (to the base) b form a ring.In a locally ringed space (X, OX), the residue of a section f in OX(U) at a point p of X is the reduction of the germ of f at p modulo the unique maximal ideal of the stalk of OX at p. When OX is a sheaf of functions on X, the residue of a section f at a point p is the value f(p).In general chemistry, a residue is what is left behind by a reaction.In chemistry a portion of a larger molecule is often called a residue. See residue (chemistry).In petroleum refining the residue comprises the heavier fractions that fail to vaporize. It can be used as fuel oil or cracked to produce lighter fractions. The volume and degree of cracking carried out is determined by the price difference between the light and heavy fractions and the cost of the cracking process. Crop residue
See more at Wikipedia.org...

Noun
1. matter that remains after something has been removed
(hypernym) substance, matter
(hyponym) ash
2. something left after other parts have been taken away; "there was no remainder"; "he threw away the rest"; "he took what he wanted and I got the balance"
(synonym) remainder, balance, residual, residuum, rest
(hypernym) part, portion, component part, component
(hyponym) leftover, remnant

adj. remaining, residual, residuary

(n.)
That which remains of a molecule after the removal of a portion of its constituents; hence, an atom or group regarded as a portion of a molecule; -- used as nearly equivalent to radical, but in a more general sense.
  

(n.)
That which remains after a part is taken, separated, removed, or designated; remnant; remainder.
  

(n.)
That part of a testeator's estate wwhich is not disposed of in his will by particular and special legacies and devises, and which remains after payment of debts and legacies.
  

(n.)
Any positive or negative number that differs from a given number by a multiple of a given modulus; thus, if 7 is the modulus, and 9 the given number, the numbers -5, 2, 16, 23, etc., are residues.