Causes of Parkinson's disease. Parkinson's disease is caused by a loss of nerve cells in part of the brain called the substantia nigra. This leads to a reduction in a chemical called dopamine in the brain. Dopamine plays a vital role in regulating the movement of the body.
Overnight indexed swap. An overnight indexed swap (OIS) is an interest rate swap where the periodic floating payment is generally based on a return calculated from a daily compound interest investment. The reference for a daily compounded rate is an overnight rate (or overnight index rate) and the exact averaging formula depends on the type of such rate.
eidos - (anthropology) the distinctive expression of the cognitive or intellectual character of a culture or a social group. 1  attribute - an abstraction belonging to or characteristic of an entity. 2  anthropology - the social science that studies the origins and social relationships of human beings.