Category: A
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Anerythropsia
Inability to distinguish clearly the color red.
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Anerythroplasia
Absence of red blood cell formation in the bone marrow.
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Aneroid
Operating without fluid, such as an aneroid barometer that uses atmospheric pressure instead of a liquid such as mercury.
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Anephrogenesis
Congenital absence of the kidneys.
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anencephalus
Congenital absence of the brain and cranial vault, with the cerebral hemispheres missing or reduced to small masses. This condition is incompatible with life.
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Anemophobia
Morbid fear of drafts or of the wind. An intense phobia of wind and breezes.
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Anemometer
In pulmonary function studies, a device for measuring the rate of air flow through a tube. The rate at which air flows into or out of the lung may be measured by using a calibrated anemometer.
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Anemic
To anemia; deficient in red blood cells, in hemoglobin, or in volume of blood.
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Anemia of prematurity
Anemia that gradually develops in the first months of life in an infant born before the 37th week of gestation. It is caused by insufficient production of erythropoietin. Treatment may include red blood cell transfusions (to increase iron stores) and/or recombinant human erythropoietin.
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Anemia of the newborn
Hemoglobin levels less than 14 g/dl in term newborns. Common causes include peripartum bleeding, hemolytic disease of the newborn, twin-to-twin transfusion (15% to 30% of all monochorionic twins with abnormalities of placental blood vessels), and impaired red cell manufacture caused by glucose-6-phosphate dehydrogenase deficiency.