[un.du.late] or un.du.lat.ed adj [L undulatus, fr. (assumed) L undula, dim. of L unda wave--more at water] (1658): having a wavy surface, edge, or markings "the ~ margin of a leaf"
[2]un.du.late vb -lat.ed ; -lat.ing [LL undula small wave, fr. (assumed) L] vi (1664) 1: to form or move in waves: fluctuate
2: to rise and fall in volume, pitch, or cadence
3: to present a wavy appearance ~ vt: to cause to move in a wavy, sinuous, or flowing manner syn see swing