from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An abnormal increase in muscular activity.
- n. Hyperactivity, especially in children.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. hyperkinesis
hyper- + Greek kīnēsis, movement (from kīnein, to move; see kei-2 in Indo-European roots) + -ia1.(American Heritage® Dictionary of the English Language, Fourth Edition)