parasite

(par′ă-sīt″)

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[L. parasitus, fr Gr. parasitos, dinner guest]

1. An organism that lives within, upon, and at the expense of another organism (its host), causing harm.
2. The smaller or incomplete element of conjoined twins that is attached to and dependent on the more nearly normal twin (autosite).
parasitic (par″ă-sit′ĭk)
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, adj.

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