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a statement of the meaning of a word or phrase.
conceptual definition an identification of the personal knowledge or connotative meaning of a word. These meanings are often difficult to express; the meaning is “known” but not easily put into words.
operational definition a definition, method, or procedure used to measure or represent a concept or variable in a specific situation.
target definition the definition of a specific target that is identified on the intervention scheme of the omaha system.


In optics, the power of a lens to give a distinct image.
See also: resolving power.
[L. de-finio, pp. -finitus, to bound, fr. finis, limit]


Imaging The clearly delineated limit of a thing visible by the eye. Cf Resolution.


In optics, the power of a lens to give a distinct image.
See also: resolving power
[L. de-finio, pp. -finitus, to bound, fr. finis, limit]

definition (image),

n the property of projected images relating to their sharpness, distinctness, or clarity of outline. Penumbra width is a measure of definition. See also resolution.


establishment of a clear boundary, a clear line of demarcation.

clinical definition
an accurate description of the disease in terms of clinical signs and clinicopathological findings.
epidemiological definition
an accurate description of the disease in terms of its epidemiological parameters of when, where, why and how it has occurred.
genetic definition
an accurate description of a disease in terms of the familial relationships between affected animals.
radiographic definition
a sharp line of demarcation between radiographic densities. A gradual merging of densities creates blurring of the image.

Patient discussion about definition

Q. What is the Definition of Anemia? My doctor told me I have anemia, based on my latest blood tests. What is anemia?

A. In laymans terms it is low iron. Most women get it sometime in their lives due to menstration and other factors. You need to increase your iron intake. Lots of beets, beans, spinich, and lots of other foods can help.

Q. what is the definition of Autism? how would i know if one is autistic and the other one is not , or has only minor disorder ?

A. Autism is a brain development disorder that is characterized by impaired social interaction and communication, and restricted and repetitive behavior, all starting before a child is three years old. This set of signs distinguishes autism from milder autism spectrum disorders (ASD) such as pervasive developmental disorder not otherwise specified. Diagnosis should be made if suspected, by a specialits in child psychiatry or child developement.

Q. What is the definition of Autism?

A. Autism is defined by symptoms from each of the following three categories: qualitative impairment in social interaction, impairment in communication, and restricted repetitive and stereotyped patterns of behavior or interests.

By definition, the onset of autistic disorder is before the age of 3 years, although in some cases, it is not recognized until a child is much older.

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References in periodicals archive ?
71) The majority of post-Atkins implementing statutes suggests a national consensus against executing mentally retarded persons, especially those who satisfy the clinical definition of mental retardation.
99) The court held that the state could differentiate between those who meet the clinical definition of mental retardation and the "far more diffuse and much harder to define" class of people "who function at the same mental and adaptive level as the result of other clinical disorders (including dementia caused by traumatic organic brain damage) not related to developmental disadvantages.
To complicate matters, his disease was quickly progressing to the clinical definition of AIDS (very low T-cell count).
We still use this functional and clinical definition today, though other definitions have been proposed.
Whether his obituary relates specifically to the National Cholesterol Education Program's Adult Treatment Panel III (ATP III) (2) definition of metabolic syndrome or to all attempts at making a clinical definition of the metabolic syndrome is unclear.
Other studies planned to improve health services response included: the development of algorithms for the management of STDs and AIDS patients; the preparation of a referral protocol for people with HIV/AIDS and their families; the evaluation of the clinical definition of AIDS; a study on the relationship of HIV and tuberculosis (TB) to improve the treatment of TB and a study on the socioeconomic impact of AIDS at the individual, family, community, and macroeconomic levels.
Nearly 2 out of 3 adults now meet or exceed the clinical definition of overweight, and 3 out of 10 children are overweight or at risk for overweight.
The clinical definition of stress is when pressure exceeds our perceived ability to cope.
The terms sexual addiction and sexual compulsion have entered the vernacular only in the past decade or so, and there is still no clinical definition for such terms.
A shift from the clinical definition and diagnosis of disease towards a molecular definition and diagnosis is hoped for, and this is where the parallel shift may occur.
Cullen's effort to define MCS (6), primarily for research purposes, is now the most widely used clinical definition for this condition.
The American College of Physicians, 1989: "The existence of an environmental illness as presented in clinical ecology theory must be questioned because of the lack of clinical definition.

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