[ahy-oh-tuh-siz-uh
m] 
| the conversion of other vowel sounds, esp. in Modern Greek, into (ē), the sound of iota. |
| 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.] |