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.
Profundus meant literally deep in Latin, and profound had the same meaning when it entered English in the 14th century. Of people, it means very knowledgeable or insightful, but sometimes if a person tries to sound profound they're really just giving you superficial knowledge dressed up with big words.