Diphthongization

Diph`thong·i·za'tion noun The act of changing into a diphthong. H. Sweet.
Found on http://www.encyclo.co.uk/webster/D/70

Diphthongization

• (n.) The act of changing into a diphthong.
Found on http://thinkexist.com/dictionary/meaning/diphthongization/
No exact match found