-lshən noun
( -s )
Etymology: Latin avulsion-, avulsio, from avulsus (past participle of avellere to tear off, from a, ab from, away + vellere to pluck, pull) + -ion-, -io -ion — more at of , vulnerable
: a forcible separation or detachment: as
a. medicine : a tearing away of a structure or part accidentally or surgically
surgical avulsion of a part of the phrenic nerve to rest a diseased lung
b. : a sudden cutting off of land by flood, currents, or change in course of a body of water ; especially : one that separates a portion from one person's property and joins it to that of another