Webster's English Dictionary

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seam

1. seam \'se-m\ \-.li-k\ n [ME seem, fr. OE se-am; akin to OE si-wian to 
   sew - m]ore at SEW 1a: the joining of two pieces (as of cloth or leather) 
   by sewing usu. near  the edge 1b: the stitching used in such a joining  2: 
   the space between adjacent planks or strakes of a ship  3a: a line, groove, 
   or ridge formed by the abutment of edges  3b: a thin layer or stratum (as 
   of rock) between distinctive layers; als o : a bed of coal or other 
   valuable mineral of any thickness 3c: a line left by a cut or wound; also : 
   WRINKLE  - seam.like aj
2. seam vt 1a: to join by sewing  1b: to join as if by sewing (as by 
   welding, riveting, or heat-sealing)  2: to mark with lines suggesting seams 
   : FURROW  : to become fissured or ridgy  - seam.er n