D defs.my
Entry 2 senses Webster, 1913

amnesia

/(ăm*nē"zhŭ or ăm*nē"zĭ*ȧ)/ · am·ne·si·a · IPA /æmˈniːʒə/
01 n. Forgetfulness; loss of long-term memory.
  1. 1.
    Forgetfulness; loss of long-term memory.(Med.)
  2. 2.
    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.(Med.) [Obs.]