What does fetterlock mean?
A fetterlock is a restraint device used on horses: a hinged, padlock-like shackle fastened around the hind leg just above the fetlock joint to stop the animal from kicking out. Farriers and veterinarians have long relied on it when working on the hind feet of animals inclined to strike, making it a practical tool of equine management rather than an everyday word. The term also has a second, entirely different life in heraldry, where the fetterlock appears as a stylized shackle on coats of arms and badges. It is most famously linked with the House of York during the Wars of the Roses, and versions of it were used by figures such as Edmund of Langley, Duke of York, and later by Edward IV, often enclosing other emblems such as a falcon. Derived from fetter — a chain or shackle for the feet — combined with lock, the word is precise, technical, and largely confined to historical, equestrian, and heraldic writing today. Care should be taken not to confuse it with fetlock, the joint itself.
nounA fetterlock is a device on a horse's hind leg — a hinged shackle or lock fitted just above the fetlock joint — used to prevent the horse from kicking, especially during farriery or veterinary treatment. It is also the name of a heraldic charge: a stylized shackle in the shape of a D with a hinged bar, borne on coats of arms and famously associated with the House of York.
- A hinged shackle fastened around a horse's hind leg above the fetlock joint to prevent kicking.
- A heraldic charge depicting such a shackle, notably a badge of the House of York.
"The farrier slipped a fetterlock above the hind fetlock to keep the stallion from lashing out while he worked."
"The groom snapped the fetterlock into place before allowing the blacksmith near the young colt's hind hooves."
"The Yorkist banners were charged with a fetterlock enclosing a falcon, emblem of Edward IV's household."
The plural is regularly formed; multiple devices are referred to as fetterlocks.
"Both hind legs were fitted with padded fetterlocks before the examination began."
The fetterlock was the badge of the House of York — a locked shackle said to symbolize a prince 'locked in safety' until his time came.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fetterlock
Fetterlock derives from the Middle English word fetter, itself from Old English feter, meaning a chain or shackle for the feet, combined with lock, reflecting its function as a fastening restraint. It emerged in English in the medieval period as the practical name for the equine hobble used by farriers and grooms. Its adoption as a heraldic badge by the House of York gave the word a second, symbolic life from the late fourteenth century onward. It shares its Germanic root fetter with related words denoting foot-restraints across the Germanic languages.
How fetterlock is actually used
Fetterlock is a technical term of farriery, equine management, and heraldry; it is rare in everyday speech. In British usage it appears chiefly in historical, military, and heraldic contexts, and it should not be confused with the anatomical term fetlock. The plural form is regular.
Easily confused with fetterlock
A fetlock is the joint on a horse's leg (or the tuft of hair behind it), whereas a fetterlock is a locking shackle fitted above that joint to restrain the leg.