-lənt adjective
Etymology: undul ate (II) + -ant
1. : moving with the rise and fall of waves : fluctuating, heaving , rippling
undulant waters asway — Amy Lowell
a ripe and undulant figure, which she covered no more than sufficiently to meet the police requirements — R.L.Taylor
2. : having a form or outline like that of waves : rolling
well-kept farms and undulant meadows — American Guide Series: Vermont