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Noun: parasite  'per-u,sIt [N. Amer], 'pa-ru,sIt [Brit]
  1. 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
     
  2. A follower who hangs around a host (without benefit to the host) in hope of gain or advantage
    - leech, sponge, sponger

Derived forms: parasites

Type of: acolyte, being, follower, organism

Antonym: host

Encyclopedia: Parasite