n.
Pronunciation: sp ī - ' ri-l ə m
Function: noun
Inflected Form: plural -ril · la \ - ' ri-l ə \
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)