Myeloid Cells: The granular leukocytes and their stem cells.
Myelopoiesis: Formation of bone marrow and the blood cells that originate in the bone
Myeloproliferative: Rapid production of bone marrow constituents.
Necrosis: The death of a circumscribed portion of tissue. Simple necrosis is
degeneration of the cytoplasm and nucleus without change in the gross appearance of
Neutropenia: A decrease in the number of neutrophils in the blood.
Neutrophil (Polymorphonuclear Neutrophil or Segmented Neutrophil): A
granulocyte having fine neutrophilic (pink-violet) granules in the cytoplasm. The nucleus
is divided into two or more lobes; each lobe is usually connected by a filament.
Neutrophilia: An increase in neutrophils.
Normoblast. The nucleated precursor of the normal red blood cell. Also called a
Normocyte (Erythrocyte): A red blood cell of normal size.
NRBC: Nucleated red cell, usually a metarubricyte when seen in the peripheral blood
: An intranuclear pale blue body, surrounded:
by a dense condensation
Occult Blood: The presence of blood that cannot be detected except by special
Oligochromemia: A decrease in hemoglobin.
Oligocythemia: A decrease in the number of erythrocytes.
Organoid: Structures present in cells resembling organs.
Ovalocyte: An elliptical erythrocyte.
Oxyhemoglobin: The bright red hemoglobin that is loosely combined with oxygen and
found in arterial blood.
Pancytopenia: A reduction in all three formed elements of the blood, namely, the
erythrocytes, leukocytes and thrombocytes.