fetlock
noun
fet·lock ˈfet-ˌläk 
1
a
: a projection bearing a tuft of hair on the back of the leg above the hoof of a horse or similar animal see horse illustration
b
: the tuft of hair itself
2
: the joint of the limb at the fetlock
Example Sentences
Recent Examples on the Web Even fans who wouldn’t know a furlong from a fetlock, understand that Derby Day requires the widest brims, the boldest colors and the most outrageous equestrian clichés. 
Michael Solomon, Forbes, 7 May 2022 First racing fatality Del Mar nearly made it through the entire meeting (almost 2,500 starters) without a racing fatality, but the 2-year-old colt Honor Award was euthanized after suffering a fractured right front fetlock in the second race. Bill Center, San Diego Union-Tribune, 6 Sep. 2021 Omaha Beach was found Thursday to be suffering from light swelling in his right hind fetlock, Mandella said, and his team made the decision to pull him from the race. Lucas Aulbach, The Courier-Journal, 23 Jan. 2020 Training accident at Del Mar Bowl of Soul, a 3-year-old filly for Bob Baffert suffered a rare hind fetlock injury during training on Monday and was euthanized. Los Angeles Times, 31 July 2019 Bowl of Soul, a 3-year-old filly was euthanized after sustaining an injury to her hind fetlock, a joint similar to an ankle, while training on July 29, according to the California Horse Racing Board. Hollie Silverman, CNN, 13 Aug. 2019 Del Mar had its third training fatality on Monday when Bowl of Soul, trained by Bob Baffert, broke down with an injury to her right hind fetlock, which is similar to an ankle. John Cherwa, San Diego Union-Tribune, 30 July 2019 Bowl Of Soul, a 3-year-old filly trained by Bob Baffert, broke down Monday with an injury to her right hind fetlock, which is similar to an ankle. Los Angeles Times, 30 July 2019 The track recently invested $500,000 for a machine that can help diagnose fetlock (ankle) injuries without having to put a horse under anesthesia. John Cherwa, latimes.com, 22 June 2019 See More
Michael Solomon, Forbes, 7 May 2022 First racing fatality Del Mar nearly made it through the entire meeting (almost 2,500 starters) without a racing fatality, but the 2-year-old colt Honor Award was euthanized after suffering a fractured right front fetlock in the second race. Bill Center, San Diego Union-Tribune, 6 Sep. 2021 Omaha Beach was found Thursday to be suffering from light swelling in his right hind fetlock, Mandella said, and his team made the decision to pull him from the race. Lucas Aulbach, The Courier-Journal, 23 Jan. 2020 Training accident at Del Mar Bowl of Soul, a 3-year-old filly for Bob Baffert suffered a rare hind fetlock injury during training on Monday and was euthanized. Los Angeles Times, 31 July 2019 Bowl of Soul, a 3-year-old filly was euthanized after sustaining an injury to her hind fetlock, a joint similar to an ankle, while training on July 29, according to the California Horse Racing Board. Hollie Silverman, CNN, 13 Aug. 2019 Del Mar had its third training fatality on Monday when Bowl of Soul, trained by Bob Baffert, broke down with an injury to her right hind fetlock, which is similar to an ankle. John Cherwa, San Diego Union-Tribune, 30 July 2019 Bowl Of Soul, a 3-year-old filly trained by Bob Baffert, broke down Monday with an injury to her right hind fetlock, which is similar to an ankle. Los Angeles Times, 30 July 2019 The track recently invested $500,000 for a machine that can help diagnose fetlock (ankle) injuries without having to put a horse under anesthesia. John Cherwa, latimes.com, 22 June 2019 See More Word History
Etymology
Middle English fitlok, fetlak; akin to Old English fōt foot
First Known Use
14th century, in the meaning defined at sense 1a
Medical Definition
fetlock
noun
fet·lock ˈfet-ˌläk
1
a
: a projection bearing a tuft of hair on the back of the leg above the hoof of a horse or similar animal
b
: the tuft of hair itself
2
: the joint of the limb at the fetlock