| phonic | Relating to sound or to the voice. See: phonetic. (05 Mar 2000) |
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| phonic spasm | A spasmodic contraction of the intrinsic muscles of the larynx excited by attempted phonation, producing either adductor or abductor subtypes caused by central nervous system disease. A localised form of movement disorder. Synonym: phonic spasm, spastic dysphonia. (05 Mar 2000) |