Prosthesis is an artificial replacement of a missing part of the body.

Prosthesis may also refer to:

Prosthesis (linguistics), an addition of a phoneme at the beginning of a word, for easier pronunciation Prosthetic group, a nonprotein component of a conjugated protein Prosthetic makeup or FX prosthesis, a prosthetic intended to radically alter appearance or provide special effects in film, television and stage Prosthetic Records, a record label Prosthesis, a gelechioid moth genus nowadays considered synonymous with Blastobasis

See also Prothesis (disambiguation), often used synonymously with prosthesis Orthotics, devices which support or correct the function of a limb or the torso