Is nail biting a disorder?

i bite my nails a lot, and i was reading something on wikipedia, and i just wanted to know if it was a disorder or not.Is nail biting a disorder?
It is not. Biting your nails is simply a habit that most people consider gross. Theres nothing that makes it a disorder in any way. Your brain is simply trained to do it, just like swinging your arms like running. If you try hard enough, you don't do it.