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
a forcible tearing or surgical separation of one body part from another
例句
用作名词 (n.)
Even relatively minor trauma can result in avulsion of the splenic substance. 甚至轻微的创伤就能引起脾实质撕裂。
美
[ə'vʌlʃən]
