ˈprästhəsə̇s, in sense 2 präsˈthēsə̇s noun
( plural prosthe·ses -thəˌsēz, -ˈthēˌsēz)
Etymology: Late Latin, from Greek, literally, addition, from prostithenai to put to, add, from pros near, toward, to + tithenai to place, put — more at pros- , do
1.
a. : the addition of a sound or syllable to a word especially by prefixing (as in newt, beloved )
b. : the addition of one or more syllables at the beginning of a member or verse — used especially in ref. to Greek and Latin prosody; compare aphaeresis
2. : an artificial device to replace a missing part of the body (as a suction socket to replace a lower leg or a dental restoration)