To do this, they may recommend having a medical procedure, such as a bone marrow aspiration or a bone marrow biopsy, to collect a sample of bone marrow. The results of a bone marrow aspiration and/or biopsy help doctors diagnose the following conditions: 1  An infection with an unknown cause. 2  Blood disorders.3  Chromosomal or genetic diseases. 4  Cancer of the blood cells, such as leukemia.he procedures can also be used to monitor the side effects of chemotherapy and determine whether the treatment is working. About the procedure. A bone marrow aspiration is a procedure that removes a sample of the liquid portion of bone marrow.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  two-dimensionality, flatness, planeness(noun) the property of having two dimensions. 2  flatness(noun) a want of animation or brilliance. 3  flatness(noun) a deficiency in flavor.
Gauging / Measurement: Flatness is can be measured using a height gauge run across the surface of the part if only the reference feature is held parallel. You are trying making sure that any point along the surface does not go above or below the tolerance zone.