Hematocrit is a blood test that measures the percentage of the volume of whole blood that is made up of red blood cells. This measurement depends on the number of red blood cells and the size of red blood cells.
Definition of profound for Students. 1  1 : having or showing great knowledge and understanding a profound thinker. 2  2 : very deeply felt profound sorrow.
profound adjective (EXTREME) C2 felt or experienced very strongly or in an extreme way: His mother's death when he was aged six had a very profound effect on him. The invention of the contraceptive pill brought about profound changes in the lives of women.