proth·e·sis 
(prŏthĭ-sĭs)
(prŏthĭ-sĭs)n. pl. proth·e·ses (-sēz′)
1. Linguistics The addition of a phoneme or syllable at the beginning of a word, as in Spanish espina, "thorn," from Latin spina.
2. Eastern Orthodox Church
a. The preparation of the bread and wine for the Eucharist.
b. The table used for this preparation.
[Greek, prefixing, from protithenai, prothe-, to put before : pro-, before; see PRO-2 + tithenai, to put; see dhē- in the Appendix of Indo-European roots.]
pro·thetic (prŏ-thĕtĭk) adj.
pro·theti·cal·ly adv.