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[puh-ree-sis, par-uh-sis] /pəˈri sɪs, ˈpær ə sɪs/
noun, Pathology
partial motor paralysis.
a late manifestation of syphilis, characterized by progressive dementia and paralysis.
1685-95; < New Latin < Greek páresis paralysis, a letting go, equivalent to pare- (variant stem of pariénai to let go) + -sis -sis
Related forms
[puh-ret-ik, -ree-tik] /pəˈrɛt ɪk, -ˈri tɪk/ (Show IPA),
noun, adjective
paretically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for paresis


/pəˈriːsɪs; ˈpærɪsɪs/
noun (pathol) (pl) -ses (-ˌsiːz)
incomplete or slight paralysis of motor functions
short for general paresis See general paralysis of the insane
Derived Forms
paretic (pəˈrɛtɪk) adjective
Word Origin
C17: via New Latin from Greek: a relaxation, from parienai to let go, from para-1 + hienai to release
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for paresis

"partial paralysis," 1690s, Modern Latin, from Greek paresis "letting go, slackening of strength, paralysis," from stem of parienai "to let go," from para- (see para- (1)) + hienai "to send, throw" (see jet (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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paresis in Medicine

paresis pa·re·sis (pə-rē'sĭs, pār'ĭ-sĭs)
n. pa·re·ses (-sēz)

  1. Slight or partial paralysis.

  2. General paresis.

pa·ret'ic (pə-rět'ĭk) adj. & n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for paresis

general paralysis of the insane

psychosis caused by widespread destruction of brain tissue occurring in some cases of late syphilis. Mental changes include gradual deterioration of personality, impaired concentration and judgment, delusions, loss of memory, disorientation, and apathy or violent rages. Convulsions are not uncommon, and while temporary remissions sometimes occur, untreated paresis is eventually fatal.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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