An adjective that relates to the granulocyte precursor cell in bone marrow. example - myeloid leukaemia, which arises from abnormal growth in the blood-forming tissue of the bone marrow.
The term myeloid suggests an origin either in the bone marrow or the spinal cord, or a resemblance to the marrow or spinal cord.
In hematopoiesis, the term "myeloid cell" is used to describe any blood cell that is not a lymphocyte. This terminology is frequently seen when classifying cancers, especially leukemia.
It should not be confused with "myelin", which is an insulating layer covering the axons of many neurons.