Definitions For Itacism

Noun

ITACISM (plural ITACISMs) Alternate form of iotacism : At [Revelation] 2:25 the family reading is αχρις ου ανοιξω [until I open], instead of αχρις ου αν ηξω [until I come]. Not only is ανοιξω unintelligible here, but it is a transparent itacism οι for η.
Hodges and Farstad, Introduction to The Majority Text

Etymology

Named after iotacism, shifting the pronunciation of the name of letter η ({{w, eta}}) from {{IPAchar, /ɛːta/, lang=grc}} to {{IPAchar, /ita/, lang=el}} in Greek.