avulsion

Noun	1.	avulsion - 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 alteration, change, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"
	2.	avulsion - a forcible tearing or surgical separation of one body part from another separation - the act of dividing or disconnecting

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