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amnesiac

[am-nee-zhee-ak, -zee-]
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noun
  1. a person affected by amnesia.
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adjective
  1. Also am·ne·sic [am-nee-sik, -zik] /æmˈni sɪk, -zɪk/. displaying the symptoms of amnesia.
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Origin of amnesiac

1910–15; amnesi(a) + -ac, after such pairs as mania, maniac
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for amnesiac

n.

"one affected by amnesia," 1913, from amnesia (q.v.).

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Online Etymology Dictionary, © 2010 Douglas Harper

amnesiac in Medicine

amnesiac

(ăm-nēzē-ăk′, -zhē-ăk′)
n.
  1. One who is afflicted with amnesia.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.