The Collaborative International Dictionary of English v.0.48:

Seam \Seam\, n. [OE. seem, seam, AS. se['a]m; akin to D. zoom,
   OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s["o]m,
   and E. sew. [root] 156. See Sew to fasten with thread.]
   1. The fold or line formed by sewing together two pieces of
      cloth or leather.
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   2. Hence, a line of junction; a joint; a suture, as on a
      ship, a floor, or other structure; the line of union, or
      joint, of two boards, planks, metal plates, etc.
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            Precepts should be so finely wrought together . . .
            that no coarse seam may discover where they join.
                                                  --Addison.
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   3. (Geol. & Mining) A thin layer or stratum; a narrow vein
      between two thicker strata; as, a seam of coal.
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   4. A line or depression left by a cut or wound; a scar; a
      cicatrix.
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   Seam blast, a blast made by putting the powder into seams
      or cracks of rocks.

   Seam lace, a lace used by carriage makers to cover seams
      and edges; -- called also seaming lace.

   Seam presser. (Agric.)
      (a) A heavy roller to press down newly plowed furrows.
      (b) A tailor's sadiron for pressing seams. --Knight.

   Seam set, a set for flattering the seams of metal sheets,
      leather work, etc.
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