A hydrophobic substance is one that does not have an affinity for water; it does not dissolve in or mix well with water.
Nonpolar Molecule: Molecules without any separation of charge, so no positive or negative poles are formed.
Lipid: A type of organic molecule, often fats and oils, that is hydrophobic.
Hydrophobic Interaction: The tendency of nonpolar molecules to aggregate in aqueous solution and exclude water molecules.