1. The American Heritage Science Dictionary - Cite This Source - Share This parasite (pÄr'É™-sÄ«t') Pronunciation Key
An organism that lives on or in a different kind of organism (the host) from which it gets some or all of its nourishment.
Parasites are generally harmful to their hosts, although the damage they do ranges widely from minor inconvenience to debilitating or fatal disease. â—‡ A parasite that lives or feeds on the outer surface of the host's body, such as a louse, tick, or leech, is called an ectoparasite. Ectoparasites do not usually cause disease themselves although they are frequently a vector of disease, as in the case of ticks, which can transmit the organisms that cause such diseases as Rocky Mountain spotted fever and Lyme disease. â—‡ A parasite that lives inside the body of its host is called an endoparasite. Endoparasites include organisms such as tapeworms, hookworms, and trypanosomes that live within the host's organs or tissues, as well as organisms such as sporozoans that invade the host's cells. See more at host.
2. American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
parasite
An organism that lives off or in another organism, obtaining nourishment and protection while offering no benefit in return. Human parasites are often harmful to the body and can cause diseases, such as trichinosis.
Note: The term parasite is often applied to a person who takes advantage of other people and fails to offer anything in return
3. par·a·site (pr-st) n.
An organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host.
In conjoined twins, the usually incomplete twin that derives its support from the more nearly normal fetus.
4. WordNet - Cite This Source - Share This parasite noun
1. an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host [ant: host]
2. a follower who hangs around a host (without benefit to the host) in hope of gain or advantage [syn: leech]
5. American Heritage Dictionary - Cite This Source - Share This par·a·site (pÄr'É™-sÄ«t') Pronunciation Key n.
Biology An organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host.
One who habitually takes advantage of the generosity of others without making any useful return.
One who lives off and flatters the rich; a sycophant.
A professional dinner guest, especially in ancient Greece.
6. Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
par·a·site /ˈpærəˌsaɪt/ Pronunciation Key - Show Spelled Pronunciation[par-uh-sahyt] Pronunciation Key - Show IPA Pronunciation
–noun 1. an organism that lives on or in an organism of another species, known as the host, from the body of which it obtains nutriment.
2. a person who receives support, advantage, or the like, from another or others without giving any useful or proper return, as one who lives on the hospitality of others.
3. (in ancient Greece) a person who received free meals in return for amusing or impudent conversation, flattering remarks, etc.
A parasite is of a diff species not your own young
There was only one of the definitions that didnt spell out another organism ...of another species