Is arthralagia any disease of a joint?

No, arthralagia itself is not a disease, but a medical term used to describe joint pain or discomfort in one or more joints. It is a symptom that can indicate an underlying medical condition affecting the joints, such as arthritis, injury, infection, or other joint disorders. The term 'arthralgia' is used to describe the sensation of pain in a joint, without specifying the cause or nature of the pain.