Pernicious-anemia meaning

A severe anemia most often affecting older adults, caused by failure of the stomach to absorb vitamin B12 and marked by a decrease in number and an increase in the size of red blood cells, by gastrointestinal disturbances, and by lesions of the spinal cord.
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A form of anemia characterized by a gradual reduction in the number of the red blood cells, gastrointestinal and nervous disturbances, etc., due to a deficiency of vitamin B12
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A severe anemia most often affecting older adults, caused by failure of the stomach to absorb vitamin B12 and marked by a decrease in number and an increase in the size of red blood cells, by gastrointestinal disturbances, and by lesions of the spinal cord.
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(pathology) A severe form of anemia caused by vitamin B12 insufficiency.
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