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non compos mentis

(nän käm′pōs mentis)

Law not of sound mind; mentally incapable of handling one's own affairs

Origin: L

See non compos mentis in American Heritage Dictionary 4

adjective
Not of sound mind and hence not legally responsible; mentally incompetent.

Origin:

Origin: Latin nōn compos mentis

Origin: : nōn, not

Origin: + compos, in control

Origin: + mentis

Origin: , genitive sing. of mēns, mind

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