A pathological or diseased condition caused by an improperly healed bone fracture typically in the long bones of the legs, arms, etc. which results in the appearance of a "false joint" or a bone-like formation that looks like such a bone connection: Ben developed pseudarthrosis because he wouldn't let his broken leg heal without any weight bearing; in other words, the pseudarthrosis appeared to be the result of not staying off his broken leg until it was completely healed.