What does "parasitical" mean?

Parasitical: (Bot. & Zoöl.) Of or pertaining to parasites; living on, or deriving nourishment from, some other living animal or plant. See Parasite, 2 & 3. Parasitic gull, Parasitic jager. (Zoöl.) See Jager. -- Par`a*sit"ic*al*ly, adv. -- Par`a*sit"ic*al*ness, n.

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