1. an animal or plant that lives on another
1. A tick is an insect that lives as a parasite on the body of an animal.
2. a person who lives on another
He's thirty now, jobless and still living with his parents: he's nothing but a parasite.
para (beside)#sitos (food) (Latin)
para (Skt) means other. Site means place to build home. Parasite means: insect living on other person's body.