What is defined as the replacement of a missing part by an artificial substitute?

The term that refers to the replacement of a missing part by an artificial substitute is "prosthesis." A prosthetic device is specifically designed to take the place of a lost body part, such as a limb or a dental structure. These devices are tailored to the individual and can restore functionality, improve mobility, and enhance the quality of life for the user.

In contrast, a transplant involves the transfer of a living organ or tissue from one body to another, which is fundamentally different from simply providing an artificial substitute. Rehabilitation focuses on the process of helping individuals regain abilities and functions after injury or illness, rather than replacing lost parts. Implantation typically refers to the insertion of an artificial device or tissue into the body but does not specifically emphasize the aspect of functioning as a substitute for a missing part in the same way a prosthesis does.