parasitic

1. Of, relating to, or characteristic of a parasite.
2. Caused by a parasite: parasitic diseases.

adjective

Of or characteristic of a parasite: bloodsucking, parasitical. Slang freeloading. See dependence/independence.

An organism living or feeding on another organism to the detriment of the host organism.

Pertaining to parasites. See also arteritis, bronchitis, gastritis, gastroenteritis, hypersensitivity, pneumonia, tracheobronchitis, helmintic.