para-, par-

An organism that serves as the host of a parasite.

1. Symbiosis in which one population (or individual) adversely affects the other, but cannot live without it.
2. Infection or infestation with parasites.
3. Etymology: "a hanger-on, a toady, a person who lives on others", from Middle French (about 1400 to 1600) parasite; from Latin parasitus, from Greek parasitos, "person who eats at the table of another"; from para-, "beside" + sitos, "food".

The scientific meaning of "animal" or "plant that lives on others" is first recorded in 1646.

Infection or infestation with a parasite or parasites.

1. To live on or in a host; such as, a parasite.
2. To infest or live on an animal or plant, as a parasite

The science or study of parasites and parasitism.

An irrational dread of parasites.

A parasite city; a city that is over-developed and economically non-productive.

Infection or infestation with parasites.

Having a special affinity for parasites.

The affinity of a drug for infective parasites.

Any dysfunction associated with sleep, e.g., somnabulism, pavor nocturnus, enureseis, or nocturnal seizures.

1. When one symbiont damages another. It is similar to parasitism.
2. The ability of two different types of organisms to exist closely with one another without giving an advantage or disadvantage to the other.
3. The relationship between a free-living lichen and another lichen or fungus which infests it and establishes a symbiotic relationship with the algae of the lichen.