| Webster's Online Dictionary |
| Part of Speech | Definition | |
| Noun | 1. An alternative spelling for "Diphthongization": The act of changing into a diphthong.[Websters]. | |
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Date "Diphthongation" was first used in popular English literature: sometime before 1914. (references) |
| Part of Speech | Definition | |
| Noun | 1. An alternative spelling for "Diphthongization": The act of changing into a diphthong.[Websters]. | |
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Date "DIPHTHONGATION" was first used in popular English literature: sometime before 1914. (references) |