名詞 avulsion:

1. an abrupt change in the course of a stream that forms the boundary between two parcels of land resulting in the loss of part of the land of one landowner and a consequent increase in the land of another
2. a forcible tearing or surgical separation of one body part from another

a.vul.sion

n.（名詞）
Medicine The forcible tearing away of a body part by trauma or surgery.
【醫(yī)學】 撕脫：通過創(chuàng)傷或以手術方法用力抽出一部分組織
The sudden movement of soil from one property to another as a result of a flood or a shift in the course of a boundary stream.
土地所有權轉移：因洪水或界河河道的改變而導致一人所有的土地突然轉移，被他人所有