from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An abnormal increase in muscular activity.
- noun Hyperactivity, especially in children.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
from The American Heritage® Dictionary of the English Language, 4th Edition
(iv) the central and the peripheral nervous system (giving loss of appetite, hyperkinesia, aggressiveness and in severe cases encephalopathy; in industrial workers symptoms like wrist and foot drop - 'palsy' - are seen).