AD is an abbreviation commonly recognized for which condition?

The abbreviation "AD" is commonly recognized for Alzheimer's Disease, which is a progressive neurological disorder that affects memory, thinking, and behavior. Alzheimer's Disease is the most prevalent form of dementia and is characterized by the deterioration of cognitive functions, impacting a person's ability to perform daily activities.

While other conditions mentioned may have similar abbreviations, they are not commonly recognized simply as "AD." Attention Deficit Disorder typically uses the abbreviation ADD, Acute Depression is not generally abbreviated in the same manner, and Affective Disorder refers to a broader category that includes various mood disorders. Therefore, Alzheimer's Disease stands out as the condition most widely associated with the abbreviation "AD."