sed·i·men·ta·ry /ˌsɛdəˈmɛntəri, ˈmɛntri/
  (a.)沈渣的,沈澱物的,由沈澱物所生成的
  Sed·i·men·ta·ry a.  Of or pertaining to sediment; formed by sediment; containing matter that has subsided.
  Sedimentary rocks. Geol. See Aqueous rocks, under Aqueous.
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  sedimentary
       adj : resembling or containing or formed by the accumulation of
             sediment; "sedimentary deposits"