Seton \Se"ton\, n. [F. s['e]ton (cf. It. setone), from L. seta a thick, stiff hair, a bristle.]

(Med. & Far.) A few silk threads or horsehairs, or a strip of linen or the like, introduced beneath the skin by a knife or needle, so as to form an issue; also, the issue so formed.

Source: Webster's Revised Unabridged Dictionary (1913)