pathological

[path-uh-loj-i-kuhl]
adjective
1.
of or pertaining to pathology.
2.
caused by or involving disease; morbid.
3.
caused by or evidencing a mentally disturbed condition: a pathological hoarder.
4.
dealing with diseases: a pathological casebook.
Also, pathologic.


Origin:
1680–90; < Greek pathologik(ós) (see pathology, -ic) + -al1

pathologically, adverb
nonpathologic, adjective
nonpathological, adjective
nonpathologically, adverb
postpathologic, adjective
postpathological, adjective
semipathologic, adjective
semipathological, adjective
semipathologically, adverb
unpathological, adjective
unpathologically, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pathological or pathologic (ˌpæθəˈlɒdʒɪkəl)
 
adj
1.  of or relating to pathology
2.  relating to, involving, or caused by disease
3.  informal compulsively motivated: a pathological liar
 
pathologic or pathologic
 
adj
 
patho'logically or pathologic
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

pathological
1680s, "pertaining to disease," formed in English from pathology. Sense of "worthy to be a subject of pathology, morbid, excessive" (e.g. pathological liar) is attested from 1845. Related: Pathologically.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

pathological path·o·log·i·cal (pāth'ə-lŏj'ĭ-kəl) or path·o·log·ic (-ĭk)
adj.

  1. Of or relating to pathology.

  2. Relating to or caused by disease.


path'o·log'i·cal·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang Dictionary

pathological

adj.
1. [scientific computation] Used of a data set that is grossly atypical of normal expected input, esp. one that exposes a weakness or bug in whatever algorithm one is using. An algorithm that can be broken by pathological inputs may still be useful if such inputs are very unlikely to occur in practice.
2. When used of test input, implies that it was purposefully engineered as a worst case. The implication in both senses is that the data is spectacularly ill-conditioned or that someone had to explicitly set out to break the algorithm in order to come up with such a crazy example.
3. Also said of an unlikely collection of circumstances. "If the network is down and comes up halfway through the execution of that command by root, the system may just crash." "Yes, but that's a pathological case." Often used to dismiss the case from discussion, with the implication that the consequences are acceptable, since they will happen so infrequently (if at all) that it doesn't seem worth going to the extra trouble to handle that case (see sense 1).
FOLDOC
Computing Dictionary

pathological definition


1. [scientific computation] Used of a data set that is grossly atypical of normal expected input, especially one that exposes a weakness or bug in whatever algorithm one is using. An algorithm that can be broken by pathological inputs may still be useful if such inputs are very unlikely to occur in practice.
2. When used of test input, implies that it was purposefully engineered as a worst case. The implication in both senses is that the data is spectacularly ill-conditioned or that someone had to explicitly set out to break the algorithm in order to come up with such a crazy example.
3. Also said of an unlikely collection of circumstances. "If the network is down and comes up halfway through the execution of that command by root, the system may just crash." "Yes, but that's a pathological case." Often used to dismiss the case from discussion, with the implication that the consequences are acceptable, since they will happen so infrequently (if at all) that it doesn't seem worth going to the extra trouble to handle that case (see sense 1).
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Though having a big mess is a far cry from pathological hoarding, such behavior
  appears to be on a continuum.
One is a pathological smuggler of rare birds.
But it's nothing like the wealth of pathological material you can extract from
  a preserved body.
And each pathological variation demands its own particular treatment plan.
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