Bible Dictionaries
Triphthongal

Webster's Dictionary

(a.) Of or pertaining to a triphthong; consisting of three vowel sounds pronounced together in a single syllable.

Bibliography Information
Webster, Noah. Entry for 'Triphthongal'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/triphthongal.html. 1828.