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dyslogy, dyslogia

Pathology. an inability to express ideas or reasoning in speech because of a mental disorder.
See also: Speech
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dyslogia - impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses)
defect of speech, speech defect, speech disorder - a disorder of oral speech