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| This glossary contains: 19186 medical terms |
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Aseptic necrosis
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Aseptic necrosisCondition in which poor blood supply to an area of bone leads to bone death. Also called avascular necrosis and osteonecrosis.
RELATED TERMS--------------------------------------
Condition
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.
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.
Bone
Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed, found in many animals. Bones support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; are also involved with cell formation, calcium metabolism, and mineral storage. The bones of an animal are, collectively, known as the skeleton.
Death
1. The end of life. The cessation of life. (These common definitions of death ultimately depend upon the definition of life, upon which there is no consensus.) 2. The permanent cessation of all vital bodily functions. (This definition depends upon the definition of "vital bodily functions.") See: Vital bodily functions. 3. The common law standard for determining death is the cessation of all vital functions, traditionally demonstrated by "an absence of spontaneous respiratory and cardiac functions." 4. The uniform determination of death.
Necrosis
Dead tissue that surrounds healthy tissue in the body.
Osteonecrosis
See 'Aseptic necrosis'.
SIMILAR TERMS--------------------------------------
Aseptic
The absence of microorganisms. By contrast, something that just discourages the growth of microorganisms is antiseptic.
Aseptic bursitis
"Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as ""bursitis."" Most commonly this is not an infectious condition (aseptic bursitis)."
Aseptic necrosis of bone
Death of a part or whole of a bone which often forms part of a joint. Usually occurs due to inadequate blood supply. (Avascular necrosis, Osteonecrosis).
PREVIOUS AND NEXT TERMS--------------------------------------
Ascus
An elongated spore case containing the spores of certain fungi including yeast.
ASCUS
An acronym for Atypical Squamous Cells of Undetermined Significance. This term is used in the Bethesda System for reporting Pap smear findings and indicates that some flat (squamous) cells look unusual and may or may not be pre-malignant or malignant. Of all Pap tests with an ASCUS reading, 90-95% are caused by benign conditions, chiefly infections. The remaining 5-10% prove to be precancer or cancer.
ASD
Acronym for atrial septal defect.
Aseptic
The absence of microorganisms. By contrast, something that just discourages the growth of microorganisms is antiseptic.
Aseptic bursitis
"Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as ""bursitis."" Most commonly this is not an infectious condition (aseptic bursitis)."
Aseptic necrosis
Asexual
1. Without sexual desire or interest. Someone with seemingly no sexual drive. 2. Referring to reproduction without the combination of genetic material with another individual. Yeast can reproduce asexually by budding.
Asian cholera
A devastating and sometimes lethal disease with intense vomiting and profuse watery diarrhea was discovered in 1883 to be due to infection with the bacteria Vibrio cholerae.
Asian flu
A pandemic of influenza A (H2N2) in 1957-58. First identified in China in late February 1957, the Asian flu spread to the United States by June 1957 where it caused about 70,000 deaths. Also known as Asian influenza.Immunity to this strain of influenza A (H2N2) was rare in people less than 65 years of age, and a pandemic was predicted. In preparation, vaccine production began in late May 1957, and health officials increased surveillance for flu outbreaks. Unlike the virus that caused the 1918 pandemic, the 1957 pandemic virus was quickly identified, due to advances in scientific technology. Vaccine was available in limited supply by August 1957.
Asian influenza
See: Asian flu.
Asn
Asparagine. See also: Amino acid symbols.
RELATED TERMS--------------------------------------
Condition
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.
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.
Bone
Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed, found in many animals. Bones support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; are also involved with cell formation, calcium metabolism, and mineral storage. The bones of an animal are, collectively, known as the skeleton.
Death
1. The end of life. The cessation of life. (These common definitions of death ultimately depend upon the definition of life, upon which there is no consensus.) 2. The permanent cessation of all vital bodily functions. (This definition depends upon the definition of "vital bodily functions.") See: Vital bodily functions. 3. The common law standard for determining death is the cessation of all vital functions, traditionally demonstrated by "an absence of spontaneous respiratory and cardiac functions." 4. The uniform determination of death.
Necrosis
Dead tissue that surrounds healthy tissue in the body.
Osteonecrosis
See 'Aseptic necrosis'.
SIMILAR TERMS--------------------------------------
Aseptic
The absence of microorganisms. By contrast, something that just discourages the growth of microorganisms is antiseptic.
Aseptic bursitis
"Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as ""bursitis."" Most commonly this is not an infectious condition (aseptic bursitis)."
Aseptic necrosis of bone
Death of a part or whole of a bone which often forms part of a joint. Usually occurs due to inadequate blood supply. (Avascular necrosis, Osteonecrosis).
PREVIOUS AND NEXT TERMS--------------------------------------
Ascus
An elongated spore case containing the spores of certain fungi including yeast.
ASCUS
An acronym for Atypical Squamous Cells of Undetermined Significance. This term is used in the Bethesda System for reporting Pap smear findings and indicates that some flat (squamous) cells look unusual and may or may not be pre-malignant or malignant. Of all Pap tests with an ASCUS reading, 90-95% are caused by benign conditions, chiefly infections. The remaining 5-10% prove to be precancer or cancer.
ASD
Acronym for atrial septal defect.
Aseptic
The absence of microorganisms. By contrast, something that just discourages the growth of microorganisms is antiseptic.
Aseptic bursitis
"Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as ""bursitis."" Most commonly this is not an infectious condition (aseptic bursitis)."
Aseptic necrosis
Asexual
1. Without sexual desire or interest. Someone with seemingly no sexual drive. 2. Referring to reproduction without the combination of genetic material with another individual. Yeast can reproduce asexually by budding.
Asian cholera
A devastating and sometimes lethal disease with intense vomiting and profuse watery diarrhea was discovered in 1883 to be due to infection with the bacteria Vibrio cholerae.
Asian flu
A pandemic of influenza A (H2N2) in 1957-58. First identified in China in late February 1957, the Asian flu spread to the United States by June 1957 where it caused about 70,000 deaths. Also known as Asian influenza.Immunity to this strain of influenza A (H2N2) was rare in people less than 65 years of age, and a pandemic was predicted. In preparation, vaccine production began in late May 1957, and health officials increased surveillance for flu outbreaks. Unlike the virus that caused the 1918 pandemic, the 1957 pandemic virus was quickly identified, due to advances in scientific technology. Vaccine was available in limited supply by August 1957.
Asian influenza
See: Asian flu.
Asn
Asparagine. See also: Amino acid symbols.
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This dictionary contains 19186 terms.
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