thor·ough·pin /ˈθɝəˌpɪn, ˈθʌrə-/
  thor·ough·pin /ˈθɝəˌpɪn, ˈθərə-/ 名詞
  滑膜鞘腫脹
  Thor·ough·pin n. Far. A disease of the hock (sometimes of the knee) of a horse, caused by inflammation of the synovial membrane and a consequent excessive secretion of the synovial fluid; -- probably so called because there is usually an oval swelling on each side of the leg, appearing somewhat as if a pin had been thrust through.
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