Rad
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  Rad



Rad

   Radiation absorbed dose. A unit of measurement of the absorbed dose of ionizing radiation.



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Repression
A defense mechanism, operating unconsciously, that banishes unacceptable ideas, fantasies, affects, or impulses from consciousness or that keeps out of consciousness what has never been conscious. Although not subject to voluntary recall, the repressed material may emerge in disguised form. Often confused with the conscious mechanism of suppression. resistance One's conscious or unconscious psychological defense against bringing repressed (unconscious) thoughts into conscious awareness.

Respondent conditioning
Elicitation of a response by a stimulus that normally does not elicit that response. The response is one that is mediated primarily by the autonomic nervous system (such as salivation or a change in heart rate). A previously neutral stimulus is repeatedly presented just before an unconditioned stimulus that normally elicits that response. When the response subsequently occurs in the presence of the previously neutral stimulus, it is called a conditioned response, and the previously neutral stimulus, a conditioned stimulus.

Residual phase
The phase of an illness that occurs after remission of the florid symptoms or the full syndrome.

Retroperitoneal
Residing behind the peritoneam; this chamber is not in the abdominal cavity. For instance the kidney is a retroperitoneal.

Recurrent abortion
The occurrence of 3 or more miscarriages (which are medically termed "spontaneous abortions") with no intervening pregnancies. Recurrent abortion (or, as it is sometimes called, habitual abortion) is a form of infertility. It may be due to chromosome abnormalities.

Rad

Radiculopathy
A disease or other problem affecting a nerve root.

Radiology
The branch of medicine that deals with the use of x-rays.

Radon
A colorless, radioactive gas produced by the decay of radium. The presence of sufficient quantities of this gas in homes is linked with the development of lung cancer.

Recrudescence
To reoccur after a temporary absence.

Relapse
The return of a disease after its apparent resolution.

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