diphthongic

English

Etymology

From diphthong +‎ -ic.

Adjective

diphthongic (not comparable)

1. Of the nature of diphthong; diphthongal.
   • 1874, Henry Sweet, A History of English Sounds from the Earliest Period:

     The old-diphthongic ou was sharply distinguished from the new-diphthongic ou

References

“diphthongic”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.