from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Attention deficit disorder in which hyperactivity is present.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A developmental disorder in which a person has a persistent pattern of impulsiveness and inattention, with or without a component of hyperactivity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a condition (mostly in boys) characterized by behavioral and learning disorders
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