You have an arthritide when you have one of the types of arthritis. These can prove to be real stumper terms even for medical students.
Here are some examples:
Example: Osteoarthritis (OA) is the most common of the arthritides.
Example: Rheumatoid Arthritis (RA) can be a debilitating arthritide.
Note: The word "arthritide" is also a now obsolete term for a skin eruption from arthritis or rheumatic origins.

