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.
Definition of Flat Character. A flat character is a type of character in fiction that does not change too much from the start of the narrative to its end. Flat characters are often said not to have any emotional depth. E. M. Foster has discussed some features of flat characters in his book, Aspects of the Novel. According to Foster, a flat character is a simple character, shown by the author as having just one or two qualities, which generally remain the same throughout the story, not undergoing significant growth or changes. The audience does not know much about these characters, because the writer does not provide detailed information about them.