[rick.ett.sia] n, pl -si.as or -si.ae also -sia [NL, genus name, fr. Howard T. Ricketts d. 1910 Am. pathologist] (1919): any of a family (Rickettsiaceae) of rod-shaped, coccoid, or diplococcus-shaped, often pleomorphic bacteria that cause various diseases (as typhus) -- rick.ett.si.al adj
RICKETTSIA
Meaning of RICKETTSIA in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012