Which of the following terms is associated with fat?

The term associated with fat is "lip/o." In medical terminology, the prefix "lip/o" derives from the Greek word "lipos," which specifically means fat. This prefix is commonly used in various medical terms related to fat and lipid metabolism, such as "lipoma" (a benign tumor made of fat tissue) and "lipid" (fats and fat-like substances in the body).

In contrast, the other choices represent different concepts. "Lith/o" pertains to stones, particularly in the context of medical conditions involving calculi, such as "lithiasis," which refers to the formation of stones in organs like the kidney or gallbladder. "Lob/o" refers to lobes, often used in reference to structures in the organs, such as the lobes of the lungs or the liver. "Lumb/o" signifies the lower back or lumbar region of the spine, relating to anatomical structures and conditions that may arise in that part of the body. Thus, "lip/o" is clearly the most accurate choice for the term associated with fat.