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| rick·ett·si·a [ ri kétsee ə ] (plural rick·ett·si·as or rick·ett·si·ae [ ri kétsee ] or rick·ett·si·a) |
noun |
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| Definition: |
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parasitic bacterium causing disease: a parasitic bacterium that typically lives inside ticks and can be transmitted to humans, causing Rocky Mountain spotted fever, forms of typhus, and other diseases. Order Rickettsiales.
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| [Early 20th century. < modern Latin, after H. T. Ricketts (1871-1910), U.S. pathologist] |
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  rick·ett·si·al adjective |
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