In mathematics, statistics, and the mathematical sciences, a parameter (G: auxiliary measure)'s a quantity that defines certain characteristics of systems or functions that serves to relate functions and variables using a common variable (often t) when such a relationship would be difficult to explicate with an equation. In different contexts the term may have special uses. Examples In a section on frequently misused words in his book The Writer's Art, James J. Kilpatrick quoted a letter fr… (More on Parameter)