The term 'Symbols of Change, in Math' can be summarized by the crossword solution 'Deltas, ' which is a six-letter word. In mathematics, the delta symbol (Δ) is used to represent change or difference in a certain quantity. It is also used to denote the difference between two values, such as the difference between two points on a graph. The delta symbol is often used in calculus and other branches of mathematics to represent the rate of change of a function.