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.
rigidity Rigidity is a quality found in people and objects that don't bend â though they might eventually break. When we see rigidity in a person, it means they're severe, like a teacher who punishes you for being late even though you were busy saving an orphan from a polar bear. Rigidity means no bending â in that case, of the rules. Objects and substances can have rigidity as well, if they literally won't bend. Rigidity means about the same thing as inflexibility, another word that describes rock-solid, unyielding people and substances.