[ey-men-shuh, uh-men-]

noun Psychiatry.

lack of intellectual development; imbecility; severe mental retardation.

Origin of amentia

1350–1400; Middle English < Latin, equivalent to āment- (see ament2) + -ia -ia Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for amentia



severe mental deficiency, usually congenitalCompare dementia

Word Origin for amentia

C14: from Latin: insanity, from āmēns mad, from mēns mind
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for amentia

"mental deficiency," late 14c., from Latin amentia "madness," from amentem "mad," from a- "away from" + mentem "mind" (see mind (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

amentia in Medicine


[ā-mĕnshə, ə-mĕn-]


Insufficient mental development or functioning.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.