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    Not normal. Deviating from the usual structure, position, condition, or behavior. In referring to a growth, abnormal may mean that it is cancerous or premalignant (likely to become cancer).


The term "condition" has a number of biomedical meanings including the following: 1.An unhealthy state, such as in "this is a progressive condition." 2.A state of fitness, such as "getting into condition." 3.Something that is essential to the occurrence of something else; essentially a "precondition." 4.As a verb: to cause a change in something so that a response that was previously associated with a certain stimulus becomes associated with another stimulus; to condition a person, as in behavioral conditioning.

Not normal. Deviating from the usual structure, position, condition, or behavior. In referring to a growth, abnormal may mean that it is cancerous or premalignant (likely to become cancer).

The sum of the values of all observations or data points divided by the number of observations, an arithmetical average.


Abnormal Fibrinogens
Fibrinogens which have a functional defect as the result of one or more amino acid substitutions in the amino acid sequence of normal fibrinogen. Abnormalities of the fibrinogen molecule may impair any of the major steps involved in the conversion of fibrinogen into stabilized fibrin, such as cleavage of the fibrinopeptides by thrombin, polymerization and cross-linking of fibrin. The resulting dysfibrinogenemias can be clinically silent or can be associated with bleeding, thrombosis or defective wound healing.

Abnormal Hemoglobins
Hemoglobins characterized by structural alterations within the molecule. The alteration can be either absence, addition or substitution of one or more amino acids in the globin part of the molecule at selected positions in the polypeptide chains.

Abnormal Movements
Abnormal involuntary movements which primarily affect the extremities, trunk, or jaw that occur as a manifestation of an underlying disease process. Conditions which feature recurrent or persistent episodes of dyskinesia as a primary manifestation of disease may be referred to as dyskinesia syndromes (see MOVEMENT DISORDERS). Dyskinesias are also a relatively common manifestation of BASAL GANGLIA DISEASES.

Abnormal Pupillary Functions
Conditions which affect the structure or function of the pupil of the eye, including disorders of innervation to the pupillary constrictor or dilator muscles, and disorders of pupillary reflexes.

Abnormal Reflexes
An abnormal response to a stimulus applied to the sensory components of the nervous system. This may take the form of increased, decreased, or absent reflexes.

Abnormalities, Cardiovascular
Congenital structural abnormalities of the cardiovascular system.

Abnormalities, Congenital
Congenital malformations of organs or parts.

Abnormalities, Congenital, Nervous System
Structural abnormalities of the central or peripheral nervous system resulting primarily from defects of embryogenesis.

Abnormalities, Craniofacial
Congenital structural deformities, malformations, or other abnormalities of the cranium and facial bones.

Abnormalities, Digestive System
Congenital structural abnormalities of the digestive system.

Abnormalities, Drug-Induced
Congenital abnormalities caused by medicinal substances or drugs of abuse given to or taken by the mother, or to which she is inadvertently exposed during the manufacture of such substances. The concept excludes abnormalities resulting from exposure to non-medicinal chemicals in the environment.

Abnormalities, Eye
Congenital absence of or defects in structures of the eye; may also be hereditary.

Abnormalities, Heart
Imperfections or malformations of the heart, existing at birth.

Abnormalities, Jaw
Congenital absence of or defects in structures of the jaw.

Abnormalities, Maxillofacial
Congenital structural deformities, malformations, or other abnormalities of the maxilla and face or facial bones.

Abnormalities, Mouth
Congenital absence of or defects in structures of the mouth.

Abnormalities, Musculoskeletal
Congenital structural abnormalities and deformities of the musculoskeletal system.

Abnormalities, Radiation-Induced
Congenital changes in the morphology of organs produced by exposure to ionizing or non-ionizing radiation.

Abnormalities, Respiratory System
Congenital structural abnormalities of the respiratory system.

Abnormalities, Skin
Congenital structural abnormalities of the skin.

Abnormalities, Stomatognathic System
Congenital structural abnormalities of the mouth and jaws, including the dentition.

Abnormalities, Tooth
Congenital absence of or defects in structures of the teeth.

Abnormalities, Urogenital
Congenital structural abnormalities of the urogenital system.

Abnormalities, Vaginal
The genital canal in the female, extending from the uterus to the vulva. (Stedman, 25th ed)


Arterial blood gas
ABG. The sampling of the blood levels of oxygen and carbon dioxide within the arteries, as opposed to the levels of oxygen and carbon dioxide in venous blood. Typically, the acidity, or pH, of the blood is measured simultaneously in ABG sampling.

1. Not associated with living organisms. 2. Anything in the environment incapable of life, such as the soil or weather. 3. Incompatible with life or antagonist to it. Also called abiological.

Loss of function or degeneration for reasons unknown. For example, cerebellar abiotrophy may affect coordination while cone-rod abiotrophy may cause blindness at birth.

To remove. A tumor may be ablated. To ablate the thyroid gland is to remove it. The word "ablation" came from the Latin "ablatum" meaning to carry away.


ABO blood group
The major human blood group system. A person's ABO type depends upon the presence of absence of two genes --the A and B genes. These genes are encoded on chromosome 9 (They determine part of the configuration of the red blood cell surface. A person can be A, B, AB, or O. If a person has two A genes, their red blood cells are type A. If a person has two B genes, their red cells are type B. If the person has one A and one B gene, their red cells are type AB. If the person has neither the A nor B gene, they are type O.

A substance that causes pregnancy to end prematurely and causes an abortion.

In medicine, an abortion is the premature exit of the products of conception (the fetus, fetal membranes, and placenta) from the uterus. It is the loss of a pregnancy and does not refer to why that pregnancy was lost. spontaneous abortion is the same as a miscarriage. The miscarriage of 3 or more consecutive pregnancies is termed habitual abortion.

Artificial abortion
An abortion that is brought about intentionally. Also called an induced or therapeutic abortion. As opposed to a spontaneous abortion (a miscarriage).

The word "abortive" has a number of meanings including prematurely born; fruitless or unsuccessful; imperfectly formed or developed; tending to cut short. In medicine, "abortive" has two meanings: one, causing abortion, as an "abortive medicine," is rarely used nowadays; the other meaning, that of tending to cut short is quite commonly used in medicine, as in the "abortive treatment of typhoid fever" or "abortive polio": polio cut short.

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