What does nonparasitic mean?
Nonparasitic means that something does not live on or in another organism while taking nourishment from it at the host's expense. The term is chiefly used in biology and ecology to distinguish free-living organisms from parasites. It can also describe relationships that do not harm the host, including some forms of symbiosis, although “independent” or “free-living” may be more suitable when no continuing association is involved. For example, an epiphytic moss may use a tree as a place to grow without taking nutrients from the tree, making it nonparasitic. The distinction is important because simply living on another organism does not automatically make one a parasite: exploitation and harm to the host are central to the definition. The word is also useful figuratively when discussing systems, behaviours, or dependencies that do not exploit or damage another party.
adjectiveNot parasitic; not living on or in a host organism at the host's expense.
- Not parasitic; living without taking nourishment from a host organism at the host's expense.
"Mosses are nonparasitic plants that use trees only as supports."
"The organism has a nonparasitic relationship with the algae on which it grows."
"Unlike many parasitic worms, this species is nonparasitic and feeds independently."
An epiphyte may grow on a tree without being parasitic: living on a host is not the same as living at its expense.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nonparasitic come from?
The prefix non- is a Latin-derived negative prefix meaning “not.” The adjective parasitic comes through French from Latin parasiticus, which was borrowed from Greek parasitos, a term originally referring to a guest or one who ate with another and later to an organism living on or with another. The Greek word ultimately became the source of parasite, parasitic, parasitism, and the broader scientific vocabulary of parasitology.
How nonparasitic is actually used
Chiefly used in biology and ecology. It describes a plant, animal, microorganism, or way of life that does not exploit a host organism. Figurative uses are possible but uncommon.
Easily confused with nonparasitic
A parasitic organism benefits from a host while harming it, whereas a nonparasitic organism does not exploit its host at the host's expense.