The billowy plains still remain in places, but in the vicinity of streams the billows give way to deep ravines.
She realized that a child's mind is like a shallow brook which ripples and dances merrily over the stony course of its education and reflects here a flower, there a bush, yonder a fleecy cloud; and she attempted to guide my mind on its way, knowing that like a brook it should be fed by mountain streams and hidden springs, until it broadened out into a deep river, capable of reflecting in its placid surface, billowy hills, the luminous shadows of trees and the blue heavens, as well as the sweet face of a little flower.
The ice-sheet wore down from the hills and filled the valleys with debris until the surface has a billowy appearance.
They consist of slightly rounded domes or billowy snowfields of vast thickness.
The pahoehoe has a smooth but billowy or hummooky surface, and is marked by lines which show that it cooled as it flowed.