What does ADHD stand for?

What does ADHD mean?

ADHD	Attention Deficit Hyperactivity Disorder Community » Educational
ADHD	Always Direct, Hardly Diplomatic Miscellaneous » Funnies
ADHD	Allways Direct, Hardly Diplomatic Miscellaneous » Funnies
ADHD	Avidly Deranged, Happily Demented Miscellaneous » Funnies
ADHD	Avidly Demented, Happily Deranged Miscellaneous » Funnies
ADHD	A Dead Hen's Den Miscellaneous » Funnies
ADHD	All Died Hot Dudes Miscellaneous » Funnies
ADHD	Any Deadly Hamster Dies Miscellaneous » Funnies
ADHD	Attention Deficit/Hyperactivity Disorder Medical
ADHD	attention-deficit-hyperactivity disorder Medical
ADHD	Attention Deficit Hyperactivity Disorder Medical » Physiology
ADHD	Attention Deficit Hyperactivity Disorder Community » Schools
ADHD	Attention Deficit/Hyperactivity Disorder Community » Schools