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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.
pro·thet′i·cal·ly adv.
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References in periodicals archive ?
The only difference can be seen in the prolative case, which has an additional prothetic vowel e.
Sheol" implies the name was pronounced with a prothetic aleph
Tooth supported prothetic rehabilitation in a 5-yearold child whit early childhood caries.
In a second 'give' construction, the verb (a)ma 'come' (the optional/a/is a prothetic vowel) occurs between haggi and -nai, as in (21).