Evolution

(-loo's hun.) [Same der iv.) (Alg.) The extraction of roots from powers: the converse of INVOLUTION, q. v. -(Geom.) The opening or unfolding a curve, and causing it to describe an evolve nt.- (pl.) (Mil.) The complicated movements by which troops change the order, position, and direction of their original formation by counter marching, wheeling, advancing in echelon, . [s. 348]