from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. Simple past tense and past participle of aggrade.
from The Century Dictionary and Cyclopedia
- In geology, more or less filled with detritus by a stream: said of a valley, basin, or bay.
Sorry, no etymologies found.
The lower reaches of most streams have aggraded; here, enough gravel has accumulated to promote subsurface flow, except during and immediately after rainfall.
Unlike visual recollection, aggraded by a million freeze-frames a day, touch was the sense of darkness.
Valley trains are deposits of stratified drift with which river valleys have been aggraded.
Valleys aggraded with fine waste form well-nigh level plains over which streams wind from side to side of a direct course in symmetric bends known as meanders, from the name of a winding river of Asia Minor.
In this way each part of the fan is aggraded and its symmetric form is preserved.
We may conceive, then, of the Connecticut valley and the larger trough to the southwest as basins gradually sinking at a rate perhaps no faster than that of the New Jersey coast to-day, and as gradually aggraded by streams from the neighboring uplands.
Since glacial streams are well loaded with waste due to vigorous ice erosion, the valley in front of the glacier is commonly aggraded to a broad, flat floor.
Several debris flows have aggraded the debris fan, including a large one that deposited the prominent levee at right between 1940 and 1965.
When enough water starts moving, it can scour the aggraded riverbeds, sweeping surplus sediment at frightening speeds.
Wordnik is becoming a not-for-profit! Read our announcement here.