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.
That which moistens or makes damp or wet; exuding fluid; liquid in small quantity.
The state of being moist.
Skin moisture noted as dry, moist, clammy, or diaphoretic as part of the skin signs assessment.