rickettsia rickets • rickettsiaceae · · · Info · Definitions · Characters · · rickettsia · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) any of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hosts; they cause typhus and other febrile diseases in human beings. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074