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| thor·ough·pin [ thúrrō pin, thúrrə pin ] |
noun |
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| Definition: |
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swelling of horse's leg: inflammation and swelling above the hock joint on both sides of a horse's leg, affecting the flexor tendon and causing lameness
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| [Late 18th century. <thorough "all the way through"; from the appearance of the swelling, like a pin passing through the tendon] |
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