rickettsia

[ ri-ket-see-uh ]

/ rɪˈkɛt si ə /

noun, plural rick·ett·si·ae [ri-ket-see-ee], /rɪˈkɛt siˌi/, rick·ett·si·as [ri-ket-see-uhz]. /rɪˈkɛt si əz/.

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.

Origin of rickettsia

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

OTHER WORDS FROM rickettsia

rick·ett·si·al, adjective

Words nearby rickettsia

rick, Rickenbacker, ricker, rickets, Ricketts, rickettsia, Rickettsia akari, Rickettsia australis, Rickettsia conorii, rickettsial, rickettsial disease

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for rickettsia

rickettsia

/ (rɪˈkɛtsɪə) /

noun plural -siae (-sɪˌiː) 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 (1871–1910), US pathologist

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for rickettsia

Rickettsia

[ rĭ-kĕt′sē-ə ]

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.

单词	rickettsia
释义	rickettsia [ ri-ket-see-uh ] / rɪˈkɛt si ə / noun, plural rick·ett·si·ae [ri-ket-see-ee], /rɪˈkɛt siˌi/, rick·ett·si·as [ri-ket-see-uhz]. /rɪˈkɛt si əz/. 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. Origin of rickettsia 1915–20; <New Latin, after Howard T. Ricketts (1871–1910), U.S. pathologist; see -ia OTHER WORDS FROM rickettsia rick·ett·si·al, adjective Words nearby rickettsia rick, Rickenbacker, ricker, rickets, Ricketts, rickettsia, Rickettsia akari, Rickettsia australis, Rickettsia conorii, rickettsial, rickettsial disease Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for rickettsia rickettsia / (rɪˈkɛtsɪə) / noun plural -siae (-sɪˌiː) 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 (1871–1910), US pathologist Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for rickettsia Rickettsia [ rĭ-kĕt′sē-ə ] 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® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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