One of the mysteries of the English language finally explained.
A skein of cotton or other absorbent material passed below the skin and left with the ends protruding, to promote drainage of fluid or to act as a counterirritant.
- ‘In addition to simple fistulotomy, treatments include cutting or draining setons, endo-anal mucosal advancement flaps, sliding cutaneous advancement flaps, fistulectomy with muscle repair and fibrin glue injection.’
Late Middle English: from medieval Latin seto(n-), apparently from Latin seta ‘bristle’.
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