Osteoarthritis (OA) also known as degenerative arthritis or degenerative joint disease, is a group of mechanical abnormalities involving degradation of joints, including articular...
en.wikipedia.org/wiki/Osteoarthritis 
Osteoarthritis (OA or degenerative arthritis) is a joint disease caused by cartilage loss in a joint. Pain and stiffness are symptoms. Read about diagnosis and treatment.
www.medicinenet.com/osteoarthritis/article.htm 
Osteoarthritis — Comprehensive overview covers symptoms, causes and treatment of osteoarthritis, including knee osteoarthritis.
www.mayoclinic.com/health/osteoarthritis/DS00019 
Osteoarthritis is the most common form of arthritis, affecting 20 million people in the U.S. alone. Here you'll find in-depth osteoarthritis information including ...
www.webmd.com/osteoarthritis 
n. A form of arthritis, occurring mainly in older persons, that is characterized by chronic degeneration of the cartilage of the joints. Also called degenerative ...
www.answers.com/topic/osteoarthritis 
Osteoarthritis is the most common form of arthritis . It causes pain, swelling and reduced motion in your joints. It can occur in any joint, but usually it affects ...
www.nlm.nih.gov/medlineplus/osteoarthritis.html 
Get the facts on osteoarthritis (OA) causes, symptoms, treatment, medication, prevention and pictures. Hip, knee, spine and hand pain are typical symptoms. Exercise ...
www.emedicinehealth.com/osteoarthritis/article_em.htm 
What is it? Osteoarthritis (OS-tee-oh-are-THRY-tis) (OA) is one of the oldest and most common forms of arthritis. Known as the “wear-and-tear” kind of arthritis ...
www.arthritis.org/disease-center.php?disease_id=32 
WebMD explains basic information about the causes, symptoms, and treatments for osteoarthritis.
www.webmd.com/osteoarthritis/guide/osteoarthritis-basics 
Osteoarthritis (OA) is the most common type of arthritis. Information on osteoarthritis symptoms, treatment, diagnosis, causes, risk factors, medications, natural ...
osteoarthritis.about.com