The Collaborative International Dictionary of English v.0.48:

Samshoo \Sam"shoo\, Samshu \Sam"shu\, n. [Chinese san-shao
   thrice fired.]
   A spirituous liquor distilled by the Chinese from the yeasty
   liquor in which boiled rice has fermented under pressure.
   --S. W. Williams.
   [1913 Webster]