The erosion of the bed of a stream by running water, principally by attrition of the detritus carried along by the stream, but also by the solvent action of the water
corrasion
Hyphenation
cor·ra·sion
Pronunciation
Etymology
() Ultimately from Latin corrasus, the past participle of corradere (“to scrape together”), itself from cor- (a form of con- 'together') + radere (“to scratch, scrape”).