spirillum

spi·ril·lum

noun \spī-ˈril-əm\

Definition of SPIRILLUM

1

capitalized : a genus of gram-negative bacteria comprising elongated forms having tufts of flagella at both poles and usually living in stagnant water rich in organic matter—see rat-bite fever b

2

plural spi·ril·la \-ˈril-ə\ : any bacterium of the genus Spirillum