noun \spī-ˈri-ləm\
plural spi·ril·la\-ˈri-lə\

Definition of SPIRILLUM

:  any of a genus (Spirillum) of curved elongated motile bacteria having tufts of flagella at both poles; broadly :  a spiral filamentous bacterium (as a spirochete)


New Latin, from diminutive of Latin spira coil
First Known Use: circa 1875

Rhymes with SPIRILLUM


noun \spī-ˈril-əm\   (Medical Dictionary)

Medical Definition of SPIRILLUM

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


noun    (Concise Encyclopedia)

Any of the spiral-shaped bacteria that make up the genus Spirillum, which are aquatic except for one species that causes a type of rat-bite fever in humans. The term is used generally for any corkscrewlike species of bacteria (see spirochete). Spirilla are gram-negative (see gram stain) and move by means of tufts of flagella at each end.


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