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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 Indo-European roots.]
pro·thet′ic (prŏ-thĕt′ĭk) adj.