from
The Collaborative International Dictionary of English v.0.48
Itacism \I"ta*cism\, n. [Cf. F. itacisme. See {Etacism}, and cf.
{Iotacism}.] (Greek Gram.)
Pronunciation of [eta] (eta) as the modern Greeks pronounce
it, that is, like e in the English word be. This was the
pronunciation advocated by Reuchlin and his followers, in
opposition to the etacism of Erasmus. See {Etacism}.
[1913 Webster]
In all such questions between [epsilon] and
[alpha][iota] the confusing element of itacism comes
in. --Alford.
[1913 Webster]