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.
What long and short mean, along with examples. Day Trading. Trading Term Definition: Long and Short. The terms long and short refer to whether a trade was entered by buying first or selling first. A long trade is initiated by buying, with the expectation to sell at a higher price in the future and realize a profit.