the GNU version of the Collaborative International Dictionary of English
n. A difficulty in producing vocal sounds; enfeebled or depraved voice.
The Century Dictionary and Cyclopedia
n. In pathology, difficulty in producing vocal sounds.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. speech disorder attributable to a disorder of phonation
Word Usage
"With spasmodic dysphonia, which is caused by the involuntary movement of muscles in the larynx, Botox injections can relax those muscles in the same way it relaxes the muscles in the furrowed foreheads of those who use it for cosmetic reasons."