Parasitic

a.
  1. Of the nature of a parasite; having the habits of a parasite; fawning for food or favors; sycophantic.
  2. (Bot. & Zoöl.) Of or pertaining to parasites; living on, or deriving nourishment from, some other living animal or plant. See Parasite, 2 & 3.
    3. Parasitic gull, Parasitic jager . (Zoöl.)
    See Jager.