definition of
parasite

[1] #1 parasite n. an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host. wn

[2] #2 parasite n. [leech, sponge, sponger] a follower who hangs around a host (without benefit to the host) in hope of gain or advantage. wn