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.
1 showing deep insight or understanding; going beyond what is obvious or easily seen:a profound thinker. 2  coming from the deepest part of one's feelings or being:his profound grief at the loss of his children. 3  complete and total; extending everywhere[before a noun]a profound silence.