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.
A contiguity is a continuous mass, or a series of things in contact or in proximity, or the state of being such a mass or series. The concept was first set out in the Law of Contiguity (one of Aristotle 's Laws of Association) which states that things that occur near each other in time or space are readily associated.