alluvion

/əˈluviən/

Other forms: alluvions

Definitions of alluvion

1. noun

   gradual formation of new land, by recession of the sea or deposit of sediment
   type of:

   geologic process, geological process

   (geology) a natural process whereby geological features are modified
2. noun

   clay or silt or gravel carried by rushing streams and deposited where the stream slows down
   synonyms: alluvial deposit, alluvial sediment, alluvium

   types:

   delta

   a low area of alluvial deposits where a river divides before entering a larger body of water

   placer

   an alluvial deposit that contains particles of some valuable mineral

   type of:

   deposit, sediment

   matter that has been deposited by some natural process
3. noun

   the rising of a body of water and its overflowing onto normally dry land
   synonyms: deluge, flood, inundation

   types:

   debacle

   flooding caused by a tumultuous breakup of ice in a river during the spring or summer

   flash flood, flashflood

   a sudden and great flow of water in a short period of time

   Noachian deluge, Noah and the Flood, Noah's flood, the Flood

   (Biblical) the great deluge that is said in the Book of Genesis to have occurred in the time of Noah; it was brought by God upon the earth because of the wickedness of human beings

   floodhead

   a wall of water rushing ahead of the flood

   type of:

   geological phenomenon

   a natural phenomenon involving the structure or composition of the earth