Spirillum
Pronunciation : Spi*ril"lum
Part of Speech : n.
Etymology : [NL., dim. of L. spira a coil.] (Biol.)
Definition : Defn: A genus of common motile micro?rganisms (Spirobacteria) having the form of spiral-shaped filaments. One species is said to be the cause of relapsing fever.
Source : Webster's Unabridged Dictionary, 1913