
n., pl., -ties.
- The quality or state of being irritable; testiness or petulance.
- Pathology. Abnormal or excessive sensitivity of a body organ or part to a stimulus.
- Physiology. The capacity to respond to stimuli.
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American Heritage Dictionary:
ir·ri·ta·bil·i·ty |

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Oxford Dictionary of Sports Science & Medicine:
irritability |
The responsiveness of an organism to changes in its immediate environment.
Oxford Companion to the Mind:
irritability |
— Richard L. Gregory
Saunders Veterinary Dictionary:
irritability |
1. ability of an organism or a specific tissue to react to the environment.
2. the state of being abnormally responsive to slight stimuli, or unduly sensitive.
Mosby's Dental Dictionary:
irritability |
The quality of being irritable or of responding to a stimulus.
Random House Word Menu:
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Wikipedia on Answers.com:
Irritability |
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| ICD-10 | R45.4 |
|---|---|
| ICD-9 | 799.2 |
Irritability is an excessive response to stimuli. The term is used for both the physiological reaction to stimuli and for the pathological, abnormal or excessive sensitivity to stimuli; It is usually used to refer to anger or frustration.
Irritability may be demonstrated in behavioral responses to both physiological and behavioral stimuli including environmental, situational, sociological, and emotional stimuli.
Irritability can occur in people experiencing any of a variety of conditions, including:
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![]() | American Heritage Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read more |
![]() | Oxford Dictionary of Sports Science & Medicine. The Oxford Dictionary of Sports Science & Medicine. Copyright © Michael Kent 1998, 2006, 2007. All rights reserved. Read more | |
![]() | Oxford Companion to the Mind. The Oxford Companion to the Mind. Second Edition. Copyright © Oxford University Press, 2004. All rights reserved. Read more | |
![]() | Saunders Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved. Read more | |
![]() | Mosby's Dental Dictionary. Mosby's Dental Dictionary. Copyright © 2004 by Elsevier, Inc. All rights reserved. Read more | |
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