/dis flooh"euhn see/ , n. , pl. disfluencies for 2.
1. Pathol. impairment of the ability to produce smooth, fluent speech.
2. an interruption in the smooth flow of speech, as by a pause or the repetition of a word or syllable.
Also, dysfluency .
[ 1975-80; DIS- 1 + FLUENCY ]