RESIDUE

noun Etymology: Middle English, from Anglo-French, from Latin residuum, from neuter of residuus left over, from residēre to remain Date: 14th century something that remains after a part is taken, separated, or designated or after the completion of a process ; remnant , remainder : as, the part of a testator's estate remaining after the satisfaction of all debts, charges, allowances, and previous devises and bequests, the remainder after subtracting a multiple of a modulus from an integer or a power of the integer that can appear as the second of the two terms in an appropriate congruence , a constituent structural unit (as a group or monomer) of a usually complex molecule