The term PINCH OFF is a phrase used in the field of engineering, specifically in the area of STEM engineering. The two crossword solutions for this term are STEM (4 letters) and NIP (3 letters). STEM stands for Science, Technology, Engineering, and Mathematics and is an acronym used to refer to the four disciplines that make up the field of engineering. NIP is an abbreviation for 'NIP off, ' which is a process used to pinch off a piece of material from a larger piece. This process is often used in STEM engineering when creating components or parts for a larger project.