prosthesis
//prɒsˈθiːsɪs//
Noun
prosthesisSingular
prosthesesPlural
1
An artificial device that replaces a missing body part, such as a limb, tooth, eye, or heart valve.
After the accident, he was fitted with a prosthesis to replace his missing leg.
2
(Linguistics) The addition of a letter or syllable at the beginning of a word, such as the 'e' in Spanish 'escuela' from Latin 'schola'.
The Spanish word 'escuela' is an example of prosthesis, where an 'e' was added to the Latin 'schola'.