amnesia
Concise Oxford English Dictionary © 2008 Oxford University Press:
amnesia /amˈniːzɪə/
▶noun a partial or total loss of memory.
– derivatives
amnesiac noun & adjective,
amnesic adjective & noun.
amnesiac noun & adjective,
amnesic adjective & noun.
– origin C18: from Gk amnēsia ‘forgetfulness’.
'amnesia' also found in these Oxford entries:

