Atherosclerosis, or hardening of the arteries, is a condition in which plaque builds up inside the arteries. Plaque is made of cholesterol, fatty substances, cellular waste products, calcium and fibrin (a clotting material in the blood). Atherosclerosis is a type of arteriosclerosis.
The definition of comity means politeness or mutual courtesy. 1  The peaceful coexistence of most of the nations in North America is an example of comity.  An example of comity is when a classroom of children are all happily involved in a project.
Definition of viscosity. plural. viscosities. 1 : the quality or state of being viscous. 2 : the property of resistance to flow in a fluid or semifluid. 3 : the ratio of the tangential frictional force per unit area to the velocity gradient perpendicular to the direction of flow of a liquid âcalled also coefficient of viscosity.