avulsion

• 指因洪水或河流改道导致土地突然被水流冲走并附着于他人土地，从而改变地界；也指身体部分（如牙齿、组织）的撕裂或撕脱。

A noun referring to the sudden change in a stream's course that alters land boundaries, or the forcible tearing away of a body part.

1. Legal land changeC2formallegal

   A sudden and violent change in the course of a river or stream that forms a property boundary, resulting in one landowner losing land and another gaining it.

   河道突变

   • The avulsion of the river caused a dispute between the two farmers.
   • Under property law, avulsion does not change the original boundary line.
   • The court ruled that the land loss was due to avulsion, not erosion.

2. Surgical separationC2formalmedical

   The forcible tearing away or surgical removal of a body part, such as a tooth, nerve, or limb.

   撕脱术

   • The dentist performed an avulsion of the impacted wisdom tooth.
   • Traumatic avulsion of the fingernail required immediate medical attention.
   • The surgeon carefully completed the avulsion of the damaged nerve.

   同义词amputationexcisionextractionresection