Beam: A cylinder of wood or metal, usually with a circular flange on each end, on which warp yarns are wound for slashing, weaving and warp knitting.

Bobbin: A cylindrical or slightly tapered barrel, with or without flanges, for holding slubbings, rovings, or yarns.

Boucle: A fabric woven or knit with boucle yarns. Boucle fabric has a looped or knotted surface and is used for sportswear and coats.

Boucle yarn: A novelty yarn with loops which give fabrics a rough appearance. Some boucle yarns have cotton cores with other fibers wound around them. Boucle yarns may be made from wool, cotton, silk, linen, man-made fibers, or combinations of fibers.

Braid: A narrow textile band, used as trimming or binding, formed by plaiting several strands of yarn.

Bright: the term applied to fibers whose luster has not been reduced by physical or chemical means; the opposite of dull or matte.

Broad goods: Woven fabrics 18 inches or more in width.