Foam formed by water and a fluorocarbon surfactant, used in firefighting because it floats on flammable liquids lighter than water.
Water in its standard form of H₂O, containing two protium hydrogen atoms, as opposed to heavy water.
A watery liquid from animal tissue, especially one that moistens the surface of serous membranes or that is exuded by such membranes when they become inflamed, such as in edema or a blister.
Blood serum from the tissues of immunized animals, containing antibodies and used to transfer immunity to another individual.
The watery portion of certain animal fluids like blood, milk, etc; whey.
The clear yellowish liquid obtained upon separating whole blood into its solid and liquid components after it has been allowed to clot.
An intensive moisturising product to be applied after cleansing but before a general moisturiser.