From Academic Kids
Yarn is a long continuous length of interlocked fibers, suitable for use in the production of textiles, sewing, knitting, weaving and ropemaking. Yarn can be made from any number of synthetic or natural fibers. Very thin yarn is referred to as thread. Yarns are made up of any number of plies, each ply being a single thread. These threads are twisted (plied) together to make the final yarn.
Yarn manufacturing was one of the very first processes that was industrialized. Yarn used for fabric manufacture is made by spinning short lengths various types of fibers. Synthetic fibers which have high strength, artificial lusture, and fire retardant qualities are blended with natural fibers which have good water absorbance and skin comforting qualities, in different proportions to manufacture yarn for fabric. The most widely used blends are cotton-polyester and wool-acrylic fiber blends.
Yarn is usually measured by weight. In the United States, balls of yarn are usually sold in three-ounce, four-ounce, six-ounce, and eight-ounce skeins.
In Europe the units used by textile engineers is often tex, which is the weight in grams of a kilometer of yarn. Many other units have been used over time by different industries. Template:Pic
A Yarn is also a type of story.