Main Entry: spi·ril·lum

Pronunciation: \spī-ˈri-ləm\

Function: noun

Inflected Form(s): plural spi·ril·la \-ˈri-lə\

Etymology: New Latin, from diminutive of Latin spira coil

Date: circa 1875

: 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)