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|Noun||1.||speech defect - a disorder of oral speech|
disorder, upset - a physical condition in which there is a disturbance of normal functioning; "the doctor prescribed some medicine for the disorder"; "everyone gets stomach upsets from time to time"
anarthria - partial or total loss of articulate speech resulting from lesions of the central nervous system
cataphasia - a speech disorder in which the same word is repeated several times in succession
dysarthria - impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature
dyslogia - impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses)
dysphonia - speech disorder attributable to a disorder of phonation
lallation - defective articulation of the `l' phoneme or the phoneme `r' is pronounced as `l'
lambdacism - speech defect involving excessive use or unusual pronunciation of the phoneme `l'
lisp - a speech defect that involves pronouncing `s' like voiceless `th' and `z' like voiced `th'