Number crunching is a term used to describe the process of performing mathematical calculations and computations. It is often used in the context of data analysis, where large amounts of numerical data are processed and analyzed. The term can also be used to refer to the use of computers to perform complex calculations. The crossword solution for the term number crunching is MATH, which is an abbreviation for mathematics, the field of study that deals with numbers, equations, and other mathematical concepts.