myasthenia laryngis
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phonasthenia — Weak voice production, which may be due to fatigue. SYN: functional vocal fatigue. [phon + G. astheneia, weakness] * * * phon·as·the·nia .fō nəs thē nē ə n weakness or hoarseness of voice * * * n. weakness of the voice, especially when due to… … Medical dictionary
