| organic deafness | Deafness due to a pathologic process or an organic aetiology, as opposed to psychogenic deafness. (05 Mar 2000) |
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| functional deafness | Hearing loss without evidence of organic cause or malingering; often follows severe psychic shock. Synonym: functional deafness, hysterical deafness. (05 Mar 2000) |
| low tone deafness | Inability to hear low notes or frequencies. (05 Mar 2000) |