One who specializes in the science of parasitology.
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par·a·si·tol·o·gist -'täl-ə-jəst n a specialist in parasitology esp one who deals with the worm parasites of animals
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par·a·si·tol·o·gist (par″ə-si-tolґə-jist) a specialist in parasitology.Medical dictionary. 2011.