Definify.com
Webster 1913 Edition
Itacism
I′ta-cism
,Noun.
(Greek Gram.)
Pronunciation of η (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
. In all such questions between ε and αι the confusing element of
itacism
comes in. Alford.