(noun) a technique used in behavior therapy; client is flooded with experiences of a particular kind until becoming either averse to them or numbed to them
(noun) binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid ; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
(noun) a liquid necessary for the life of most animals and plants