prosthesis

(pros-thē′sĭs )

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(pros′thĕ-sĭs)
(pros-thē′sēz″)
(pros′thĕ-sēz″)
pl. prostheses [Gr. prosthesis, an addition]

1. Replacement of a missing part by an artificial substitute, such as an artificial extremity.
2. Any artificial organ or part, including arms, hands, joints, heart valves, teeth, and others.
3. A device to augment performance of a natural function, such as a hearing aid.

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