am·ne·sia /æmˈnɪʒə/ 名詞
1. Med. Forgetfulness; loss of long-term memory.
2. Med. A defect of speech, from cerebral disease, in which the patient substitutes wrong words or names in the place of those he wishes to employ. [Obs.]
n : partial or total loss of memory; "he has a total blackout
for events of the evening" [syn: memory loss, blackout]