The term PART OF B.S. can be solved by two different crossword solutions: SCIENCE (7 letters) and SCI (3 letters). SCIENCE is an academic discipline that involves the study of the natural world, including physical and biological phenomena. It is a broad field of study that encompasses many different areas of research, such as physics, chemistry, biology, and mathematics. SCI is an abbreviation for SCIENCE, which is often used in academic settings.