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Meaning of Sehna knot

Seh'na knot"

Pronunciation: (sen'u), [key]
  1. a hand-tied knot, used in rug weaving, in which the ends of yarn looped around a warp thread appear at each of the interstices between adjacent threads and produce a compact and relatively even pile effect.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.