What does avulsion mean?
Avulsion denotes the forcible tearing away or separation of one thing from another, most commonly applied to living tissue. In medicine, an avulsion injury occurs when a tendon, ligament, nerve, or fragment of bone is ripped from its normal attachment by trauma — a tooth knocked cleanly from its socket, for instance, is described as a tooth avulsion. The term also has established uses beyond anatomy: geomorphologists speak of river avulsion when a watercourse abruptly abandons its channel for a new path, often reshaping entire landscapes, while property law uses avulsion to describe land suddenly added to or removed from a parcel by the violent action of water. Formal and technical in register, the word conveys violence and suddenness rather than deliberate surgical division. Its precise meaning across fields makes it indispensable in clinical notes, legal judgments, and scientific descriptions alike.
nounThe forcible tearing away or separation of a body part, structure, or piece of material, either surgically or as the result of injury; in geology, the sudden diversion of a river into a new channel.
- Medicine and dentistry: the forcible tearing away of a body part, tissue, or tooth, typically by trauma rather than clean surgical cutting.
- Geology and geomorphology: the rapid abandonment of an existing river channel in favor of a new course, often during a flood.
- Law: the sudden and perceptible removal or addition of land by the action of water, as distinguished from gradual accretion.
"The surgeon repaired the tendon following an avulsion at the ankle."
"An X-ray revealed an avulsion fracture where the ligament had torn a small fragment of bone from its attachment."
"Over centuries, repeated avulsions of the river redrew the delta's network of channels."
The plural follows standard English -s formation and typically refers either to multiple injury cases or to repeated geological events.
"Historical records document several major avulsions of the Yellow River over the past two millennia."
A river can commit 'avulsion' overnight — abandoning its whole channel for a new one in a single flood, which is exactly how oxbow lakes are born.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of avulsion
Avulsion derives from the Latin verb avellere, meaning 'to tear away,' formed from ab- ('away from') plus vellere ('to pluck or pull'). The noun entered English usage in the early modern period via Latin legal and anatomical vocabulary, retaining the sense of violent separation. It shares this root with related tearing words such as convulsion and revulsion, all built on the same Latin stem conveying forceful pulling apart.
Related word forms
How avulsion is actually used
Predominantly a technical term used in medicine, dentistry, law, and earth sciences; rare in everyday conversation. In legal contexts concerning land change by water, avulsion specifically denotes sudden change, contrasted with the gradual processes of accretion and erosion.
Easily confused with avulsion
Revulsion means a strong feeling of disgust or repugnance, whereas avulsion refers to the physical tearing away of tissue, land, or another structure.