# prosthesis

/ˌpɹɔsˈθɛsɪs/ (US) · /pɹˈɒsθəsˌɪs/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/prosthesis
Updated: 2026-05-25

## Definition

an artificial body part that replaces a missing one, like a leg or an arm. It can also mean a fake tooth or a device that helps you see or hear better.

For teachers: an artificial replacement for a missing body part, such as a limb, tooth, or eye. In a linguistic context, it refers to the addition of a sound or syllable to the beginning of a word to make it easier to pronounce.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.