DIPHTHONGIA
\dɪfθˈɒŋɡi͡ə], \dɪfθˈɒŋɡiə], \d_ɪ_f_θ_ˈɒ_ŋ_ɡ_iə]\
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By Alexander Duane
By Willam Alexander Newman Dorland
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The simultaneous production of two vocal sounds of different pitch, occurring in certain pathological conditions of the larynx. [Gr.]
By Smith Ely Jelliffe