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rickettsia

[ ri-ket-see-uh ]
/ r瑟藞k蓻t si 蓹 /
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noun, plural rick路ett路si路ae [ri-ket-see-ee], /r瑟藞k蓻t si藢i/, rick路ett路si路as [ri-ket-see-uhz]. /r瑟藞k蓻t si 蓹z/.
any member of the genus Rickettsia, comprising rod-shaped to coccoid microorganisms that resemble bacteria but can be as small as a large virus and reproduce only inside a living cell, parasitic in fleas, ticks, lice, and mites and transmitted by bite to vertebrate hosts, including humans, causing such severe diseases as typhus and Rocky Mountain spotted fever.
any rickettsia or rickettsialike microorganism of the orders Rickettsiales and Chlamydiales.
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Origin of rickettsia

1915鈥20; <New Latin, after Howard T. Ricketts (1871鈥1910), U.S. pathologist; see -ia

OTHER WORDS FROM rickettsia

rick路ett路si路al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2021

British Dictionary definitions for rickettsia

rickettsia
/ (r瑟藞k蓻ts瑟蓹) /

noun plural -siae (-s瑟藢i藧) or -sias
any of a group of parasitic bacteria that live in the tissues of ticks, mites, and other arthropods, and cause disease when transmitted to man and other animals

Derived forms of rickettsia

rickettsial, adjective

Word Origin for rickettsia

C20: named after Howard T. Ricketts (1871鈥1910), US pathologist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for rickettsia

Rickettsia
[ r沫-k臅ts膿-蓹 ]

n.
A genus of gram-negative bacteria that are carried as parasites by many ticks, fleas, and lice and cause diseases such as typhus, scrub typhus, and Rocky Mountain spotted fever.
The American Heritage庐 Stedman's Medical Dictionary Copyright 漏 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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