cholesterol definition chemistry
Definition. Cholesterol is a waxy type of lipid, a substance that is insoluble in water, like oil or fat. Specifically, cholesterol is a type of fat that is made up of four interlocked rings of carbon called a steroid.We know steroids from watching sports, but not all steroids are responsible for building our muscles.t uses sunlight to start a cascade of chemical reactions that break down cholesterol and use the parts to make the vitamin. Without cholesterol, you could stand out in the sun all day and still not make enough vitamin D for your body. Cholesterol is also an important component of our cell membranes.