Source : Webster's Revised Unabridged Dictionary (1913)

Sycee \Sy*cee"\, n. [Said to be from a Chinese word, se-tze or
   se-sze, meaning, fine silk, and to be so called because if
   pure it may be drawn out into fine threads.]
   Silver, pounded into ingots of the shape of a shoe, and used
   as currency. The most common weight is about one pound troy.
   [China] --McElrath.