Re-sid'ū-al, a.

a. [It. residuale. See RESIDUE.] Remaining after a part is taken.

Residual analysis (Math.), a method which proceeds by taking the difference of a function in two different states, and then expressing the relation between this difference and the difference of the corresponding states of the variable. Math. Dict.—Residual figure (Geom.), the figure remaining after a less figure has been subtracted from a greater one. Crabb.—Residual quantity (Alg.), a binomial quantity the two parts of which are connected by the negative sign, as a—b.—Residual root, the root of a residual quantity, as √a—b.