Temperament

Noun

1. A person's usual manner of thinking, behaving or reacting.
2. A tendency to become irritable or angry.
3. The altering of certain intervals from their correct values in order to improve the moving from key to key.
4. Individual differences in behavior that are biologically based and are relatively independent of learning, system of values and attitudes.
5. A moderate and proportionable mixture of elements or ingredients in a compound; the condition in which elements are mixed in their proper proportions.