plural of seam allowance

(sewing) The part of the material or fabric added to the dimensions of a sewing pattern outside the seam.

(roofing) A type of seam between adjacent sheets of metal roofing material made by turning up the edges of two adjacent panels and then folding or interlocking them in a variety of ways.

plural of seamed stocking

plural of seam set

plural of seaming machine

plural of seam presser

plural of double lock standing seam

(baseball) A pitch thrown with a grip in the "horseshoe" orientation of the ball, with the rotation at a slight angle resulting in less Magnus effect as compared to a four-seam fastball since only two of the ball's seams cross the flight path; the pitch is delivered with a similar velocity as a four-seam fastball, but has a degree of sink.

(baseball) A backspin pitch thrown with a ball gripped in the direction to cause four of the seams of the ball to cross the flight path and released with roughly equal pressure by the index and middle fingers