loam /ˈlom, ||ˈlum, ||ˈlʊm/
  肥土(vt.)用肥土填
  Loam n.
  1. A kind of soil; an earthy mixture of clay and sand, with organic matter to which its fertility is chiefly due.
     We wash a wall of loam; we labor in vain.   --Hooker.
  2. Founding A mixture of sand, clay, and other materials, used in making molds for large castings, often without a pattern.
  Loam mold Founding, a mold made with loam. See Loam, n., 2.
  Loam molding, the process or business of making loam molds. Loam plate, an iron plate upon which a section of a loam mold rests, or from which it is suspended.
  Loam work, loam molding or loam molds.
  Loam, v. i. [imp. & p. p. Loamed p. pr. & vb. n. Loaming.] To cover, smear, or fill with loam.
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  loam
       n : a rich soil consisting of a mixture of sand and clay and
           decaying organic materials