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  1. the systematic classification of diseases.
  2. the knowledge of a disease.
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Origin of nosology

From the New Latin word nosologia, dating back to 1715–25. See noso-, -logy
Related formsnos·o·log·i·cal [nos-uh-loj-i-kuh l] /ˌnɒs əˈlɒdʒ ɪ kəl/, adjectivenos·o·log·i·cal·ly, adverbno·sol·o·gist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for nosology

Historical Examples

British Dictionary definitions for nosology


  1. the branch of medicine concerned with the classification of diseases
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Derived Formsnosological (ˌnɒsəˈlɒdʒɪkəl), adjectivenosologically, adverbnosologist, noun
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 nosology


"study of diseases," 1721, from Modern Latin nosologia (perhaps via French nosologie), from noso- + -logy. Related: Nosological; nosologist.

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Online Etymology Dictionary, © 2010 Douglas Harper

nosology in Medicine


(nō-sŏlə-jē, -zŏl-)
  1. The branch of medicine that deals with the classification of diseases.nosonomy nosotaxy
  2. A classification of diseases.
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Related formsno′so•logi•cal (-sə-lŏjĭ-kəl) null adj.no•solo•gist n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.