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. That is obscure which the eye or the mind can not clearly discern or see through, whether because of its own want of transparency, its depth or intricacy, or because of mere defect of light.