avulsion
Concise Oxford English Dictionary © 2008 Oxford University Press:
avulsion /əˈvʌlʃ(ə)n/
▶noun
- 1 chiefly Medicine the action of pulling or tearing away.
- 2 Law the sudden separation of land from one property and its attachment to another, especially by flooding. Compare with alluvion.
– derivatives
avulse verb.
avulse verb.
– origin C17: from L. avulsio(n-), from avellere ‘pluck from’.
'avulsion' also found in these Oxford entries:

