noun one of a series of ridges that moves across the surface of a liquid (especially across a large body of water)
Synonymsmoving ridge
noun (physics) a movement up and down or back and forth
Synonymsundulation
noun an undulating curve
Synonymsundulation
verb signal with the hands or nod
Synonymsbeckon
verb twist or roll into coils or ringlets
Synonymscurl
Source: WordNet 3.1, Princeton University
