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Partial or total loss of memory, usually resulting from shock, psychological disturbance, brain injury, or illness.

[Greek amnēsiā, forgetfulness, probably alteration of amnēstiā, from amnēstos, not remembered : a-, not; see a-1 + mimnēskein, mnē-, to remember; see men- in Indo-European roots.]

am·ne′si·ac′ (-nē′zē-ăk′, -zhē-ăk′), am·ne′sic (-zĭk, -sĭk) n. & adj.
am·nes′tic (-nĕs′tĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Medicine) causing amnesia
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.amnestic - of or relating to or caused by amnesiaamnestic - of or relating to or caused by amnesia
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References in periodicals archive ?
Substance-induced amnestic disorder and primary dementia induced by substances in the chapter on neurocognitive disorders are also included under substance use disorders.
(2) proposed the concept of amnestic MCI (aMCI) based on clinical evaluations.
In the United States, around 80 percent of those "who fit the definition of amnestic MCI" develop Alzheimer's disease within 7 years, according to the National Institute on Aging.
That trial randomized 104 patients with amnestic mild cognitive impairment (MCI) or mild-moderate Alzheimer's to placebo or intranasal insulin 20 or 40 IU.
Thiamine supplementation provided resolution in the nystagmus and ataxia at the fourth week after hospital admission, but mild amnestic problems persisted even at the end of first year.
WKS is the concurrence of Wernicke's encephalopathy (an acute, life-threatening condition marked by ataxia, confusion, and ocular signs) and Korsakoff's psychosis (a long-term, debilitating amnestic syndrome).
Rovner, M.D., from the Sidney Kimmel Medical College of Thomas Jefferson University in Philadelphia, used screening for memory complaints to identify 221 black patients (≥65 years) with amnestic mild cognitive impairment who were randomized to either behavioral activation (to increase cognitive, physical, and social activity; 111 participants) or supportive therapy (attention control treatment; 110 participants).
Mood symptoms, schizophrenia-like psychosis or amnestic symptoms are recorded as being associated with an arachnoid cyst.
"The way AD has historically been defined is by clinical symptoms: A progressive amnestic dementia was Alzheimer's, and if there was no progressive amnestic dementia, it wasn't," Dr.
Clinical presentation of HE includes amnestic syndrome, seizures including status epilepticus, ataxia, myoclonus and psychiatric manifestations like depression, mania, psychosis and hallucinations.