Definition of parasite
1 : a person who exploits the hospitality of the rich and earns welcome by flattery
sought to rid the palace of the parasites of his prosperity
2 : an organism living in, with, or on another organism in parasitism an intestinal parasite of humans a parasite that causes malaria
3 : something that resembles a biological parasite in dependence on something else for existence or support without making a useful or adequate return
That city has become a parasite on the country.
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Time Traveler for parasite
The first known use of parasite was in 1539
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