rickettsiae

[ri-ket-see-uh]

rick·ett·si·a

[ri-ket-see-uh]
noun, plural rick·ett·si·ae [-see-ee] , rick·ett·si·as [-see-uhz] .
1.
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.
2.
any rickettsia or rickettsialike microorganism of the orders Rickettsiales and Chlamydiales.

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

rick·ett·si·al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Rickettsiae is always a great word to know.
So is bezoar. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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