Final answer:
Poikilocytosis refers to the occurrence of red blood cells of varying shapes, which may indicate certain health issues.
Step-by-step explanation:
Poikilocytosis refers to the presence of red blood cells (RBCs) of varying shapes within the bloodstream. This condition can be a sign of various underlying disorders, such as anemia, liver disease, or bone marrow dysfunctions. It is different from conditions such as polycythemia which is an elevated level of hemoglobin, and polymorphonuclear, which describes leukocytes with a lobed nucleus. The diversity in cell morphologies reflects the many roles that cells play, and while some variation in shape is normal, particularly high levels of misshaped cells, as seen in poikilocytosis, can indicate health issues.