Compos

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compos mentis

[kohm-pohs men-tis; English kom-puhs-men-tis]
adjective
Latin. sane; mentally sound.

Origin:
literally, being in full possession of one's mind

non compos mentis

[nohn kohm-pohs men-tis; English non kom-puhs men-tis]
Latin.
not of sound mind; mentally incapable of managing one's affairs.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
compo (ˈkɒmpəʊ)
 
n , pl -pos
1.  a mixture of materials, such as mortar, plaster, etc
2.  informal (Austral), (NZ) compensation, esp for injury or loss of work
 
adj
3.  military intended to last for several days: compo rations; a compo pack
 
[short for composition, compensation, composite]

compos mentis (ˈkɒmpəs ˈmɛntɪs)
 
adj
(postpositive) of sound mind; sane

non compos mentis (ˈnɒn ˈkɒmpəs ˈmɛntɪs)
 
adj
mentally incapable of managing one's own affairs; of unsound mind
 
[Latin: not in control of one's mind]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

non compos mentis
1607, from L., lit. "not master of one's mind."

compos mentis
1610s, from L., lit. "in command of one's mind," from com- "with" + stem of potis "powerful, master" (see potent).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

compos mentis com·pos men·tis (kŏm'pəs měn'tĭs)
adj.
Of sound mind; sane.

non compos mentis non com·pos men·tis (nŏn kŏm'pəs měn'tĭs)
adj.
Not of sound mind and hence not legally responsible; mentally incompetent.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Cultural Dictionary
non compos mentis [(non kom-puhs men-tis)]

A phrase used to describe someone who is out of his or her mind and therefore not legally responsible for his or her actions: “It was determined by the court that the killer was non compos mentis.” From Latin, meaning “not having control of the mind.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Abbreviations & Acronyms
compo
composition material
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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