residue
res.i.due \'rez-*-.d(y)u:\ n [ME, fr. MF residu, fr. L residuum, fr. neut.
of residuus lef]t over, fr. reside-re to remain : something that remains
after a part is taken, separated, or designated :: 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 : the second of two terms in a congruence {2 and 7 are
~s of 12 modulo 5} {9 is a quadratic ~ of 7 modulo 5 since 72-8x5=9}