rapid

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rapid

[′rap·əd]
(hydrology)
A portion of a stream in swift, disturbed motion, but without cascade or waterfall; usually used in the plural.
References in classic literature ?
Natty lowered his rifle from his arm when the challenge was made, and waiting a moment, until the terrified victim had got in a line with his eye, and had dropped near the bank of the lake, he raised it again with uncommon rapidity, and fired.
The wonderful exploit of Leather-Stocking was noised through the field with great rapidity, and the sportsmen gathered in, to learn the truth of the report.
At this instant the colonel and Monsieur d'Albon could distinctly see her features; she, herself, perceiving the two friends, sprang to the iron railing with the lightness and rapidity of a deer.
At the sound of the shot, the unknown woman, who had hitherto stood motionless, fled away with the rapidity of an arrow, uttering cries of fear like a wounded animal, and running hither and thither about the meadow with every sign of the greatest terror.
Sterling by this time had two additional pupils; for though this gentleman's rise in the world was not of that meteor-like rapidity which the admirers of his extemporaneous eloquence had expected for a preacher whose voice demanded so wide a sphere, he had yet enough of growing prosperity to enable him to increase his expenditure in continued disproportion to his income.
Such was my abominable luck in being born by the mere hair's breadth of twenty-five centuries too late into a world where kings have been growing scarce with scandalous rapidity, while the few who remain have adopted the uninteresting manners and customs of simple millionaires.
It was evident that he never considered what he had said or was going to say, and consequently the rapidity and justice of his intonation had an irresistible persuasiveness.
The rapidity of her movement, her flushed and eager face, everything betrayed that something out of the common was going on in her.
The journey soon became interesting from its rapidity, of which Morcerf had formed no previous idea.
While the count picked up the paper he put spurs to his horse, which leaped in astonishment at such an unusual stimulus, and shot away with the rapidity of an arrow.
The rapidity of the current, which in its whole course runs at the rate of from four to six knots an hour, is perhaps its most remarkable feature.
None of the fragments of any considerable size had been washed more than three or four mile down the river below their parent-source: considering th singular rapidity of the great body of water in the Sant Cruz, and that no still reaches occur in any part, this example is a most striking one, of the inefficiency of rivers i transporting even moderately-sized fragments.