What is the term for a continuous thread created by twisting fibers together?

The term for a continuous thread created by twisting fibers together is yarn. Yarn is made from the process of spinning fibers, which can come from various sources such as cotton, wool, or synthetic materials. This twisting process aligns the fibers, creating a strong and flexible strand that can be used in knitting, weaving, or other textile applications.

Twine refers to a stronger type of string made from multiple strands twisted together, typically used for tying purposes rather than textile creation. Thread is a finer strand of yarn that is specifically utilized for sewing and stitching, but it is less common to refer to it as a continuous thread in a broader context. Filament is a specific type of fiber that is long and continuous but does not imply the twisting together of fibers characteristic of yarn. Therefore, the definition of yarn best fits the description provided in the question.