spirochaeta
Spi`ro*chæ"ta, Spi`ro*chæ"te, n. Etym: [L. spira a coil + Gr. (Biol.) Defn: A genus of Spirobacteria similar to Spirillum, but distinguished by its motility. One species, the Spirochæte Obermeyeri, is supposed to be the cause of relapsing fever.