res·er·voir
n.
1. A natural or artificial pond or lake used for the storage and regulation of water.
2. A receptacle or chamber for storing a fluid.
3. An underground accumulation of petroleum or natural gas.
4. Anatomy See cisterna.
5. A large or extra supply; a reserve: a reservoir of good will.
6. Medicine An organism or a population that directly or indirectly transmits a pathogen while being virtually immune to its effects.
- Film "Reservoir Dogs" (1992)



