[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
语源
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'