Spirochaeta \Spi`ro*chae"ta\, Spirochaete \Spi`ro*chae"te\, n.
[L. spira a coil + Gr. ??? hair.] (Biol.)
A genus of Spirobacteria similar to Spirillum, but
distinguished by its motility. One species, the {Spirochaete
Obermeyeri}, is supposed to be the cause of relapsing fever.
[1913 Webster]