- a fine, threadlike piece, as of cotton, jute, or asbestos.
- a slender filament: a fiber of platinum.
- filaments collectively.
- matter or material composed of filaments: a plastic fiber.
- something resembling a filament.
- an essential character, quality, or strength: people of strong moral fiber.
- Botany.
- filamentous matter from the bast tissue or other parts of plants, used for industrial purposes.
- a slender, threadlike root of a plant.
- a slender, tapered cell which, with like cells, serves to strengthen tissue.
- a slender, threadlike element or cell, as of nerve, muscle, or connective tissue.
- Nutrition.Also called bulk, dietary fiber, roughage.
- the structural part of plants and plant products that consists of carbohydrates, as cellulose and pectin, that are wholly or partially indigestible and when eaten stimulate peristalsis in the intestine.
- food containing a high amount of such carbohydrates, as whole grains, fruits, and vegetables.
- vulcanized fiber.
- optical fiber.
- the usual US spelling of fibre
