The Collaborative International Dictionary of English v.0.48:
Aphonia \A*pho"ni*a\, Aphony \Aph"o*ny\, n. [NL. aphonia, Gr. ?, fr. ? voiceless; 'a priv. + ? voice: cf. F. aphonie.] (Med.) Loss of voice or vocal utterance. [1913 Webster] AphonicWordNet (r) 3.0 (2006):
aphonia n 1: a disorder of the vocal organs that results in the loss of voice [syn: aphonia, voicelessness]