Definition of Alzheimer's. 1  Alzheimer's disease is a progressive, degenerative disorder that attacks the brain's nerve cells, or neurons, resulting in loss of memory, thinking and language skills, and behavioral changes. Origin of the term Alzheimer's disease dates back to 1906 when Dr. Alois Alzheimer, a German physician, presented a case history before a medical meeting of a 51-year-old woman who suffered from a rare brain disorder. 2  A brain autopsy identified the plaques and tangles that today characterize Alzheimer's disease.
Since the release of the first novel, Harry Potter and the Philosopher's Stone, on 30 June 1997, the books have gained immense popularity, critical acclaim and commercial success worldwide.
The longest Harry Potter book in the series is Harry Potter and the Oder of the Phoenix. Harry Potter and the Sorcerer's Stone is 309 pages. Harry Potter and the Chamber of Sâ¦ecrets is 341 pages. Harry Potter and the Prisoner of Azkaban is 435 pages. Harry Potter and the Goblet of Fire is 734 pages.