Glossary

BioScience.com.pk try the best to avoid the use of medical terms that could make it more difficult to understand the information on this website. Still, there are a number of terms that can't be avoided and that are useful to know because they are so often used by the doctors, nurses, and other medical professionals with whom you might speak. The list below includes the terms used on BioScience.com.pk for which we have provided definitions.

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Term Definition
Rheumatic fever

Condition resulting from an inadequately treated or untreated infection with Group A streptococcus bacteria. It is a delayed immune response in which the body produces antibodies directed against itself (autoimmune). This can cause serious damage to heart valves and lead to symptoms such as swelling and pain in several joints, heart inflammation (carditis), skin nodules, rapid, jerky movements (Sydenham's chorea), and skin rash.

Reye syndrome

A rare condition that causes degeneration of the brain and is characterized by vomiting, fever, accumulation of fat in the liver, swelling of kidneys and brain, disorientation and coma; often occurs in children and following another illness, such as the flu or chickenpox.

Retina

sensing part of the eye that collects images from the lens and translates them to chemical signals that can be interpreted by the brain

Resorption

The process by which a substance, such as bone, is broken down into basic components and removed from that area of the body

Recessive Gene

One of a pair of genes whose action is expressed only when two copies are present. For example, the gene for cystic fibrosis is recessive, and the disease will not occur if one normal gene is present.

Reagent

Substance used in performing a laboratory test

Raynaud phenomenon

Intermittent episodes of pallor, cyanosis (bluing), and redness in the fingers or toes due to constricted blood vessels; it is seen with a variety of conditions and is precipitated by exposure to cold and emotional stress. It may cause numbness, tingling, and burning.

Random Urine Sample

A sample of urine collected at any time of the day; this type of sample may be used to detect the presence of various substances in the urine at one particular point in the day. Often, no special handling is required with these samples. Other types of urine samples are requested when special types of evaluations are required (see 24-hour urine sample and timed urine sample).

Random Blood Sample

A sample of blood collected at any time of the day

Quantity Testing

Also known as: Antigen Testing


Quantity testing measures how much of a particular substance or analyte is present. This type of testing can measure amounts of coagulation factors, hormones, enzymes, and many other substances. It does not, however, evaluate how well the substance is working or performing its role in the body.

Quantitative Test Results

Test results expressed as numbers

Qualitative Test Results

Test results expressed in terms of the presence (positive) or absence (negative) of a property or condition

Pus

Collection of fluid, white blood cells, microorganisms, and cellular material that indicates the presence of an infected wound or abscess

Purpura fulminans

Involves severe clotting throughout much of the body, ultimately causing death to the tissues. If not treated immediately, it is a life-threatening condition.

Pruritus

Also known as: Itch


An irritating skin condition that causes a desire to scratch