par·a·sit·ism / pair.ah.sit.ism /
noun – a type of symbiotic relationship, typically where the parasite is helped and the host is harmed.
related forms of parasitism: parasitic (the practice of parasitism), parasite (an organism displaying parasitism)
parasitism in a sentence: I hope I don't have any parasites!
examples of parasitism in nature: ticks & hosts, mosquitos & humans, tapeworms & hosts, fleas & hosts, lice & hosts