What is an artificial replacement for a missing body part called?

An artificial replacement for a missing body part is called a prosthesis. This term refers specifically to devices designed to replace hands, legs, teeth, or other body parts that may have been lost due to injury, disease, or congenital conditions. Prosthetics can greatly enhance a person's mobility and quality of life by restoring function and appearance.

The other terms listed refer to different medical conditions. Quadriplegia describes the paralysis of all four limbs, typically resulting from spinal cord injury or diseases affecting the nervous system. Hemiplegia refers to paralysis of one side of the body, often after a stroke. Aphasia involves language difficulties due to brain damage, affecting a person's ability to communicate. Understanding the distinction between these terms and their specific meanings is essential in the context of medical terminology and treatment.