Pronunciation: (hī"pur-ki-nē'zhu, -zhē-u, -zē-u, -kī-), [key]
1. Pathol.an abnormal amount of uncontrolled muscular action; spasm.
2. Psychiatry.a disorder occurring in children and adolescents, characterized by excessive activity, extreme restlessness, impulsivity, and a short attention span. Also,hy•per•ki•ne•sisPronunciation: (hī"pur-ki-nē'sis, -kī-). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.