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.
Well, he [Harry] has obviously been through a lot since book one, and book five was the book when he cracked up a little.. â J. K. Rowling. Harry Potter and the Order of the Phoenix is the fifth book in J. K. Rowling 's Harry Potter book series. It was one of the most widely-anticipated books of the series, since there was a wait of three years between it and the previous book, Goblet of Fire.