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| This glossary contains: 19186 medical terms |
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Anaphylactic shock
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Anaphylactic shock A severe and sometimes life-threatening immune system reaction to an antigen that a person has been previously exposed to. The reaction may include itchy skin, edema, collapsed blood vessels, fainting, and difficulty in breathing.
RELATED TERMS--------------------------------------
Immune
Resistant to a particular disease.
Antigen
A substance which, when present in animal tissue, stimulates the production of antibodies
Skin
Skin is an organ of the integumentary system; which is composed of a layer of tissues that protect underlying muscles and organs. Skin is used for insulation, vitamin D production, sensation, and excretion (through sweat).
Edema
Accumulation of abnormal quantities of fluid in spaces between the cells of the body. Edema can accumulate in almost any location in the body. Most common sites include the feet and ankles.
Blood
The life-maintaining fluid which is made up of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets; blood circulates through the body's heart, arteries, veins, and capillaries; it carries away waste matter and carbon dioxide, and brings nourishment, electrolytes, hormones, vitamins, antibodies, heat, and oxygen to the tissues.
Breathing
The process of respiration, during which air is inhaled into the lungs through the mouth or nose due to muscle contraction, and then exhaled due to muscle relaxation.
SIMILAR TERMS--------------------------------------
Anaphase
The stage in mitosis or meiosis during which the sister chromatids (mitosis) or homologous chromosomes (meiosis) separate and migrate toward the opposite poles of the cell.
Anaphia
The inability to feel touch. From the Greek prefix an, not + Greek haphe, touch = inability to (feel) touch. A person with anaphia is said to be anaptic.
Anaphylactoid purpura
See: Sch”nlein-Henoch purpura.
Anaphylatoxin
Substance capable of releasing histamine from mast cells.
Anaphylaxis
Immediate hypersensitivity response to antigenic challenge, mediated by IgE and mast cells. It is a life-threatening allergic reaction, caused by the release of pharmacologically active agents.
Anaplasia
Characteristics of a cell (structure and orientation) that make it identifiable as a cancer cell. Malignant.
Anaplasmosis
A tick-borne disease of cattle, sheep, and related ruminants caused by a microorganism called Anaplasma marginale and characterized by anemia and jaundice. Also called gallsickness and gall sickness.
Anaplastology
The art and science of restoring a malformed or absent part of the human body through artificial means. An anaplastologist makes prosthetic devices. From the Greek ana, again, + plastos, formed. See also: Prosthesis.
Anaprox
See: Naproxen.
Anaprox ds
Anaprox ds is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): naproxen sodium.
Anaptic
Suffering from an impaired sense of touch, (a state called anaphia) or tactile anesthesia. An anaptic person has anaphia (an, not + Greek haphe, touch = inability to (feel) touch.
PREVIOUS AND NEXT TERMS--------------------------------------
ADHD
Attention-deficit hyperactivity disorder (ADHD) is one of the most commonly diagnosed and controversial mental disorders among children, and is increasingly recognized as afflicting adults as well. Its symptoms include inattention, hyperactivity, and impulsivity.
Autism
A neurological developmental disability that results in limited cognitive abilities: the autistic individual is limited in ability to learn inductively from surrounding events. Social interactions and many kinds of conceptual learning can be strongly limited. At the same time, the autistic individual may be outstandingly good at some kinds of mental manipulations, such as, for example, arithmetical calculations.
Aneurysm
A weakness in the blood vessel wall that balloons out and may rupture at some point. Aneurysms rarely cause symptoms before the rupture, unless they are large. They do not mimic the symptoms of migraine or cluster headache. It is vital to discover them before they rupture and have catastrophic consequences such as paralysis or death.
Agoraphobia
Fear of being in situations from which escape might be difficult or embarrassing, or help might be difficult to obtain, in the event that one should have a panic attack or should feel an acute desire to leave. Such situations often include being in large crowds or “open spaces” (such as shopping malls or stadiums), using public transportation, driving on the freeway, eating in restaurants, or, in severe cases of agoraphobia, going anywhere outside one’s own home. Agoraphobia usually occurs in response to having panic attacks, but it can also develop without panic attacks.
Allergic rhinitis
Allergic rhinitis is a common allergic reaction that causes inflammation of the nose. Symptoms typically include sneezing, congestion, a runny nose, and an itchy nose. Allergic rhinitis may be seasonal or perennial.
Anaphylactic shock
Aplastic anemia
An uncommon disorder characterized by the failure of the bone marrow to produce blood cells. It may occur as an inherited condition (see Fanconi's anemia) or, more often, the disease develops later in life. This form is called acquired aplastic anemia. It leads to a severe shortage of all types of blood cell causing tiredness, susceptibility to infection, and potentially serious problems with bleeding as a result of a deficiency in blood platelets. The acquired disease is usually the result of an autoimmune attack of lymphocytes against blood cell progenitors preventing normal blood cell formation.
Aviophobia
Fear of flying. Also known as aerophobia or flight phobia.
Addison's disease
Addison's disease (also known as chronic adrenal insufficiency, or hypocortisolism) is a rare endocrine disorder. It is a disease that results from a decrease in corticosteroid secretion from the adrenal gland.
Alopecia Areata
A disorder in which the immune system attacks the hair follicles, causing loss of hair on the scalp.
RELATED TERMS--------------------------------------
Immune
Resistant to a particular disease.
Antigen
A substance which, when present in animal tissue, stimulates the production of antibodies
Skin
Skin is an organ of the integumentary system; which is composed of a layer of tissues that protect underlying muscles and organs. Skin is used for insulation, vitamin D production, sensation, and excretion (through sweat).
Edema
Accumulation of abnormal quantities of fluid in spaces between the cells of the body. Edema can accumulate in almost any location in the body. Most common sites include the feet and ankles.
Blood
The life-maintaining fluid which is made up of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets; blood circulates through the body's heart, arteries, veins, and capillaries; it carries away waste matter and carbon dioxide, and brings nourishment, electrolytes, hormones, vitamins, antibodies, heat, and oxygen to the tissues.
Breathing
The process of respiration, during which air is inhaled into the lungs through the mouth or nose due to muscle contraction, and then exhaled due to muscle relaxation.
SIMILAR TERMS--------------------------------------
Anaphase
The stage in mitosis or meiosis during which the sister chromatids (mitosis) or homologous chromosomes (meiosis) separate and migrate toward the opposite poles of the cell.
Anaphia
The inability to feel touch. From the Greek prefix an, not + Greek haphe, touch = inability to (feel) touch. A person with anaphia is said to be anaptic.
Anaphylactoid purpura
See: Sch”nlein-Henoch purpura.
Anaphylatoxin
Substance capable of releasing histamine from mast cells.
Anaphylaxis
Immediate hypersensitivity response to antigenic challenge, mediated by IgE and mast cells. It is a life-threatening allergic reaction, caused by the release of pharmacologically active agents.
Anaplasia
Characteristics of a cell (structure and orientation) that make it identifiable as a cancer cell. Malignant.
Anaplasmosis
A tick-borne disease of cattle, sheep, and related ruminants caused by a microorganism called Anaplasma marginale and characterized by anemia and jaundice. Also called gallsickness and gall sickness.
Anaplastology
The art and science of restoring a malformed or absent part of the human body through artificial means. An anaplastologist makes prosthetic devices. From the Greek ana, again, + plastos, formed. See also: Prosthesis.
Anaprox
See: Naproxen.
Anaprox ds
Anaprox ds is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): naproxen sodium.
Anaptic
Suffering from an impaired sense of touch, (a state called anaphia) or tactile anesthesia. An anaptic person has anaphia (an, not + Greek haphe, touch = inability to (feel) touch.
PREVIOUS AND NEXT TERMS--------------------------------------
ADHD
Attention-deficit hyperactivity disorder (ADHD) is one of the most commonly diagnosed and controversial mental disorders among children, and is increasingly recognized as afflicting adults as well. Its symptoms include inattention, hyperactivity, and impulsivity.
Autism
A neurological developmental disability that results in limited cognitive abilities: the autistic individual is limited in ability to learn inductively from surrounding events. Social interactions and many kinds of conceptual learning can be strongly limited. At the same time, the autistic individual may be outstandingly good at some kinds of mental manipulations, such as, for example, arithmetical calculations.
Aneurysm
A weakness in the blood vessel wall that balloons out and may rupture at some point. Aneurysms rarely cause symptoms before the rupture, unless they are large. They do not mimic the symptoms of migraine or cluster headache. It is vital to discover them before they rupture and have catastrophic consequences such as paralysis or death.
Agoraphobia
Fear of being in situations from which escape might be difficult or embarrassing, or help might be difficult to obtain, in the event that one should have a panic attack or should feel an acute desire to leave. Such situations often include being in large crowds or “open spaces” (such as shopping malls or stadiums), using public transportation, driving on the freeway, eating in restaurants, or, in severe cases of agoraphobia, going anywhere outside one’s own home. Agoraphobia usually occurs in response to having panic attacks, but it can also develop without panic attacks.
Allergic rhinitis
Allergic rhinitis is a common allergic reaction that causes inflammation of the nose. Symptoms typically include sneezing, congestion, a runny nose, and an itchy nose. Allergic rhinitis may be seasonal or perennial.
Anaphylactic shock
Aplastic anemia
An uncommon disorder characterized by the failure of the bone marrow to produce blood cells. It may occur as an inherited condition (see Fanconi's anemia) or, more often, the disease develops later in life. This form is called acquired aplastic anemia. It leads to a severe shortage of all types of blood cell causing tiredness, susceptibility to infection, and potentially serious problems with bleeding as a result of a deficiency in blood platelets. The acquired disease is usually the result of an autoimmune attack of lymphocytes against blood cell progenitors preventing normal blood cell formation.
Aviophobia
Fear of flying. Also known as aerophobia or flight phobia.
Addison's disease
Addison's disease (also known as chronic adrenal insufficiency, or hypocortisolism) is a rare endocrine disorder. It is a disease that results from a decrease in corticosteroid secretion from the adrenal gland.
Alopecia Areata
A disorder in which the immune system attacks the hair follicles, causing loss of hair on the scalp.
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This dictionary contains 19186 terms.
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