Seam, n. [OE. seem, seam, AS. seám; akin to D. zoom, OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. söm, and E. sew. √ 156. See Sew to fasten with thread.] 1. The fold or line formed by sewing together two pieces of cloth or leather.
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.
Precepts should be so finely wrought together... that no coarse seam may discover where they join. Addison.
3. (Geol. & Mining) A thin layer or stratum; a narrow vein between two thicker strata; as, a seam of coal.
4. A line or depression left by a cut or wound; a scar; a cicatrix.
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.