Proteins, from the Greek proteios, meaning first, are a class of organic compounds which are present in and vital to every living cell. In the form of skin, hair, callus, cartilage, muscles, tendons and ligaments, proteins hold together, protect, and provide structure to the body of a multi-celled organism. In the form of enzymes, hormones, antibodies, and globulins, they catalyze, regulate, and protect the body chemistry.
Definition of long division for Students. : division in arithmetic that involves several steps that are written out.
Definition of Division. Division is an operation that tells us the number of groups that can be made out of a number of items or the number of items that should be there in a group. The symbol 'Ã·' denotes division. For example, the division number sentence 8 Ã· 2 = 4 says that there are four groups of 2's in 8.