老ろう人じん性せい痴ち呆ほうろうじんせいちほうMeanings1nounsenile dementiadated termmedicineDated medical term for dementia in the elderly; now largely replaced by 老人性認知症 or simply 認知症 in modern clinical and everyday usage.See also: 老人性認知症老ろう人じん性せい痴ち呆ほうは、現げん在ざいで