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parasite

/ˈpæɹəˌsaɪt/ noun

In Latin: parasītus, parasīta Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about parasite at Wordnik → Where our words come from →

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

Origin

From Middle French parasite, from Latin parasitus, from Ancient Greek παράσιτος (parásitos, “person who eats at the table of another”), from noun use of adjective meaning "feeding beside", from παρά (pará, “beside”) + σῖτος (sîtos, “food”).

From Wiktionary, via Kaikki.org (CC BY-SA)