The Collaborative International Dictionary of English v.0.48:

Zizith \Zi"zith\, n. pl. [Heb. ts[imac]tsith.]
   The tassels of twisted cords or threads on the corners of the
   upper garment worn by strict Jews. The Hebrew for this word
   is translated in both the Authorized and Revised Versions
   (--Deut. xxii. 12) by the word "fringes."
   [Webster 1913 Suppl.]