Definition of Reticulocyte

Reticulocyte: A young red blood cell that usually remains in the bone marrow with only a few venturing out into the circulating blood. The number of reticulocytes in blood rises when red cell production is unusually vigorous, as after a major bleeding episode or after the bone marrow has been suppressed and is regenerating. The reticulocyte is so named because it has a fine reticulum representing ribosomal remains.

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