noun, plural diagnoses [dahy-uhg-noh-seez] .
the process of determining by examination the nature and circumstances of a diseased condition.
the decision reached from such an examination. Abbreviation: Dx
Biology. scientific determination; a description that classifies a group or taxon precisely.
a determining or analysis of the cause or nature of a problem or situation.
an answer or solution to a problematic situation.

1675–85; < Neo-Latin < Greek diágnōsis a distinguishing. See dia-, -gnosis

prediagnosis, noun, plural prediagnoses.

diagnosis, prognosis.
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World English Dictionary
diagnosis (ˌdaɪəɡˈnəʊsɪs)
n , pl -ses
1.  a.  the identification of diseases by the examination of symptoms and signs and by other investigations
 b.  an opinion or conclusion so reached
2.  a.  thorough analysis of facts or problems in order to gain understanding and aid future planning
 b.  an opinion or conclusion reached through such analysis
3.  a detailed description of an organism, esp a plant, for the purpose of classification
[C17: New Latin, from Greek: a distinguishing, from diagignōskein to distinguish, from gignōskein to perceive, know]

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Word Origin & History

1680s, medical application of Gk. diagnosis "a discerning, distinguishing," from diagignoskein "discern, distinguish," from dia- "apart" + gignoskein "to learn" (see gnostic).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

diagnosis di·ag·no·sis (dī'əg-nō'sĭs)
n. pl. di·ag·no·ses (-sēz)

  1. The act or process of identifying or determining the nature and cause of a disease or injury through evaluation of patient history, examination, and review of laboratory data.

  2. The opinion derived from such an evaluation.

  3. A brief description of the distinguishing characteristics of an organism, as for taxonomic classification.

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
Science Dictionary
diagnosis   (dī'əg-nō'sĭs)  Pronunciation Key 
Plural diagnoses (dī'əg-nō'sēz)
The identification by a medical provider of a condition, disease, or injury made by evaluating the symptoms and signs presented by a patient.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
His doctors have given him a diagnosis of stress-related heart disease, but his
  producers couldn't care less.
The number of Asperger's adults, like the diagnosis, is hard to pin down.
He was 77 and had been in poor health since he received a diagnosis of brain
  cancer last year.
Thanks for the possible diagnosis, though.
Image for diagnosis
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