Definition: A "gradus" is a Latin word that means "degree," and it is often used in mathematical expressions to indicate how many steps or stages are required for a certain process. For example, if you have a math problem where you need to divide 10 into 5 parts, the expression would be: "10 divided by 5." This notation shows that there are five steps involved in the division of 10 by 5, and each step is a degree from one