Kevlar (noun)

1. A heat-resistant, strong synthetic fiber, made of long chains of molecules called polymers, used in the manufacture of bullet-proof vests, ropes, and other forms of protective gear.
2. A type of synthetic fiber that is five times stronger than steel and is used to make bullet-proof vests, helmets and other forms of protective gear.

Origin:

From the name of the american chemist stephanie kwolek who first developed the material in 1965 at dupont.

Examples:

1. The kevlar vest saved the officer's life during the shooting.
2. The helmet is made from a combination of plastic and kevlar.
3. Kevlar is used in the manufacturing of body armor and other bullet-proof materials.
4. Kevlar is also used to make strong and durable ropes.
5. Kevlar fibers are also used in composite materials for aerospace and automotive applications.