reservoir

Noun

• anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies
  • an infectious agent depends on a reservoir for its survival
    

• tank used for collecting and storing a liquid (as water or oil)

• lake used to store water for community use

• a large or extra supply of something
  • a reservoir of talent
    

Related words

• Synonyms: 
  source , artificial lake , man-made lake