Dictionarydip•lo•pho•ni•aPronunciation: (dip"lu-fō'nē-u), [key] —n. Pathol. a condition in which the voice simultaneously produces two sounds of different pitch. Also called diphonia, diphthongia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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