Fiber (noun)

1. A slender, threadlike piece of material, especially one of the filaments that make up a fiber optic cable or a bundle of fibers in muscle or other tissue.
2. A substance or thread composed of natural or synthetic fibers, such as those found in plant stalks or textiles.
3. The edible parts of fruits and vegetables that are not digested but help to maintain digestive health.

Origin:

Middle english: from old french fibre, from latin fibra "a fiber, filament", from fibrum "a small thread".

Examples:

1. Fiber is an important component of a healthy diet.
2. The fibers in the rope were fraying.
3. The company is developing a new type of fiber optic cable.
4. This fabric is made of natural fibers.
5. Fiber helps to regulate digestion and prevent constipation.