n. (pl. prostheses)
1. a an artificial part supplied to remedy a deficiency, e.g. a false breast, leg, tooth, etc. b the branch of surgery supplying and fitting prostheses.
2 Gram. the addition of a letter or syllable at the beginning of a word, e.g. be- in beloved.
Derivatives:
prosthetic adj. prosthetically adv.
Etymology: LL f. Gk prosthesis f. prostithemi (as PROS-, tithemi place)