prosthesis

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pros·the·sis / präsˈ[unvoicedth]ēsis/ • n. (pl. -ses / -sēz/ ) 1. an artificial body part, such as a leg, a heart, or a breast implant: his upper jaw was removed and a prosthesis was fitted.2. (also prothesis) the addition of a letter or syllable at the beginning of a word, as in Spanish escribo derived from Latin scribo.DERIVATIVES: pros·thet·ic / -ˈ[unvoicedth]etik/ adj.pros·thet·i·cal·ly / -ˈ[unvoicedth]etik(ə)lē/ adv.

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