fiber
n. C / Un. a thin thread of material from a plant, an animal, or a factory. It is also the part of food that helps your body digest what you eat.
n. a threadlike filament or structure forming part of animal or plant tissue, or a synthetic substance. Also refers to dietary material that resists digestion by human enzymes.
Whole grains are a great source of fiber.
The technician replaced the old copper wires with high-speed fiber to improve the office internet connection.
Modern textile manufacturing relies on a blend of natural cotton fiber and synthetic polymers to create fabrics that are both breathable and durable.
Uncountable when referring to dietary material or bulk matter; countable when referring to individual threads or specific types of material.