Definition

1. Noun:
   • A follower who associates with a more powerful person or group for personal gain: A person who lives off or exploits others, typically without offering anything beneficial in return.
   • A biological organism that lives in or on another organism: An animal, plant, or microorganism that lives on or in a host organism and gets its food from or at the expense of its host, usually without killing it immediately.

Usage and Examples

• Noun (Person):

  • He was nothing but a parasite, living off the generosity of his wealthy friends.
  • The court was full of parasites seeking favors from the king.

• Noun (Biology):

  • The tick is a common parasite found on dogs.
  • Malaria is caused by a single-celled parasite transmitted by mosquitoes.

Advanced Usage and Nuances

• Social/Figurative Use: Often used metaphorically to describe people, organizations, or systems that drain resources without contributing.
  • Critics accused the corporation of being a parasite on the public welfare system.
• Technical/Biological Use: In ecology and medicine, describes a specific symbiotic relationship (parasitism).
  • The study focused on the life cycle of the intestinal parasite.

Variants and Related Words

• Parasitic (Adjective): Having the nature of or behaving like a parasite.
  • a parasitic vine / parasitic behavior
• Parasitism (Noun): The relationship between a parasite and its host, or the state of being parasitic.
  • The biology lecture covered different forms of symbiosis, including parasitism.

Synonyms

• For a person: leech, sponger, hanger-on, freeloader, sycophant.
• For an organism: pathogen (specifically for disease-causing agents), endoparasite (living inside host), ectoparasite (living on host).

Antonyms

• For a person: benefactor, contributor, patron.
• For an organism: host, symbiont (in a mutualistic relationship).

Idioms and Common Phrases

• "A parasite on society": A common phrase used to criticize a person or group perceived as taking from society without contributing.
  • The tabloids branded the fraudster as a parasite on society.

Noun

1. a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
2. 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