rickettsia

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Definition of rickettsia

2 senses · 1 part of speech · etymology included

noun

Any of a group of gram-negative bacteria, of the genus Rickettsia, carried as parasites by ticks, fleas and lice, that cause typhus and other diseases.

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noun

Any of a group of gram-negative bacteria, of the genus Rickettsia, carried as parasites by ticks, fleas and lice, that cause typhus and other diseases.
(informal)Any bacterium of the order Rickettsiales.

Definitions from Wiktionary, CC BY-SA.

Borrowed from translingual Rickettsia (genus name), from Howard Taylor Ricketts, equivalent to Ricketts + -ia.

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