fiber
- 01 B2 Upper Intermediate
a single thin thread of a material like cotton, wool, or nylon.
a single elongated piece of material, typically cylindrical, which can be spun into yarn or thread.
Simple“The detective found a tiny blue fiber from a sweater on the rug.”
In context“Forensic analysts identified a synthetic fiber caught in the door frame that matched the specific blend used in the suspect's jacket.”
UsageCountable in this sense.
- 02 B2 Upper Intermediate
the part of food, like vegetables and grains, that helps your body digest.
indigestible carbohydrate derived from plants that aids in the passage of food through the digestive system.
Simple“You should eat more fruit and beans to get enough fiber in your diet.”
In context“Nutritionists recommend a high-fiber diet to maintain gut health and reduce the risk of chronic metabolic diseases.”
UsageUsually uncountable when referring to the nutrient.
Synonymsroughagebulk - 03 C1 Advanced
a long, thin cell in your body, such as in a muscle or nerve.
an elongated, threadlike structure or cell found in animal or plant tissue.
Simple“The athlete suffered a tear in a muscle fiber during the race.”
In context“Microscopic examination revealed that the nerve fibers were beginning to regenerate after the surgical intervention.”
- 04 C2 Proficiency
the inner strength or character that makes a person do the right thing.
the essential character, nature, or moral strength of a person.
Simple“Hard work and honesty were part of his moral fiber.”
In context“The crisis tested the very fiber of her being, forcing her to choose between personal gain and ethical duty.”
Teacher's tipOften used in the fixed phrase 'moral fiber'.
- 05 C2 Proficiency
a very light type of task that a computer program runs.
a particularly lightweight thread of execution that uses cooperative rather than preemptive multitasking.
Simple“The programmer used a fiber to manage the background tasks efficiently.”
In context“By implementing fibers instead of standard system threads, the application achieved higher concurrency with significantly lower memory overhead.”
- 06 C2 Proficiency
a set of points that all map to the same result in a math function.
the preimage of a single point under a given mapping or function.
Simple“We need to calculate the fiber of the function at this specific point.”
In context“In algebraic geometry, the fiber of a morphism over a point provides crucial information about the structure of the map.”
Synonymspreimage
“Glass preforms are heated until their structure becomes loose enough to be drawn into extremely thin fibers.”
“Over two years, we used an old telecom fiber to record and identify 458 clear, high-quality thunderquakes.”