A collection of blood in any region of the body due to dilation and retardation of the circulation in capillaries and veins.
reservoir res·er·voir (rěz'ər-vwär', -vwôr', -vôr')
A fluid-containing sac or cavity.
An organism or a population that directly or indirectly transmits a pathogen while being virtually immune to its effects.
A large or extra supply; a reserve.