compact bone

This term refers specifically to the cortical bone that forms the hard exterior of skeletal elements. It is characterized by a low porosity and a highly organized structure of osteons, which allows it to bear significant weight and resist mechanical stress.

In a clinical or anatomical context, it is frequently contrasted with cancellous or spongy bone. While spongy bone is found in the interior of bones and at the ends of long bones to reduce weight, compact bone provides the necessary rigidity and strength for the bone's shaft.