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.
3 : the quality of being deep the depth of the pass. 4 : the degree of intensity depth of a color; also : the quality of being profound (as in insight) or full (as of knowledge) the depth of her experience. 5 : the quality or state of being complete or thorough a study will be made in depth.