rickettsia[ri ket′sē ə]
rickettsia definition by Webster's New World
noun pl. rickettsiae or rickettsias
any of several families (esp. Rickettsiaceae) of Gram-negative bacteria that are the causative agents of certain diseases, as typhus or Rocky Mountain spotted fever: they are transmitted to animals and humans by the bite of certain lice, ticks, etc. in whose bodies they live as parasites
Origin: Modern Latin after H. T. Ricketts (1871-1910), United States pathologist plush -ia
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- rickettsial adjective
rickettsia definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. rick·ett·si·ae
Any of various bacteria of the genus Rickettsia, carried as parasites by many ticks, fleas, and lice, that cause diseases such as typhus, scrub typhus, and Rocky Mountain spotted fever in humans.
Origin: New Latin Rickettsia, genus name, after Howard Taylor Ricketts (1871-1910), American pathologist.
- rick·ettˈsi·al adjective
rickettsia - Medical Definition
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.