iotacism


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i·o·ta·cism

 (ī-ō′tə-sĭz′əm)
n.
In Greek, the pronunciation of certain letters, like eta and upsilon, as iota (ē) because of a regular sound change.

[Late Latin iōtacismus, from Greek iōtakismos, from iōta, iota; see iota.]

iotacism

(aɪˈəʊtəˌsɪzəm)
n
(Linguistics) a tendency of vowels and diphthongs, esp in Modern Greek, to acquire the pronunciation of the vowel iota (iː)

iotacism

excessive use of the sound i and the substituting of this sound for other vowels. — iotacist, n.
See also: Language