LAB GEL is a combination of two substances used in laboratory experiments. AGAR (4 letters) is a gelatinous substance derived from seaweed, which is used as a medium for growing bacteria and other microorganisms. It is also used as a thickening agent in food products. LAB GEL is a combination of AGAR and a gel-forming polymer, such as polyacrylamide, which is used to separate proteins and other molecules in electrophoresis experiments.