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.
The term Singularity has many definitions. The everyday English definition of Singularity is a noun that designates the quality of being one of a kind, strange, unique, remarkable or unusual. For a more specific definition of Singularity we can search The Wiktionary where we get the following five Singularity definitions: