Parasitical :: Parasitical (a.) Of the nature of a parasite; fawning for food or favors; sycophantic.
Parasitical :: Parasitical (a.) Of or pertaining to parasites; living on, or deriving nourishment from, some other living animal or plant. See Parasite, 2 & 3..
Parasiticide :: Parasiticide (n.) Anything used to destroy parasites.