tap·i·o·ca /ˌtæpiˈokə/
  樹薯粉
  Tap·i·o·ca n.  A coarsely granular substance obtained by heating, and thus partly changing, the moistened starch obtained from the roots of the cassava. It is much used in puddings and as a thickening for soups. See Cassava.
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  tapioca
       n : granular preparation of cassava starch used to thicken
           especially puddings