alluvion
/əˈljuːvɪən/noun
mass noun
- the action of the sea or a river in adding to the area of land by deposition (used in legal contexts)（法律用语）新生地, 土地自然增长。比较AVULSION.
词源
mid 16th cent. （originally denoting a flood， especially one carrying suspended material which is then deposited）： from French， from Latin alluvio （n-）, from ad- 'towards' + luere 'to wash'.