spirillum
- n spirally twisted elongate rodlike bacteria usually living in stagnant water
- n any flagellated aerobic bacteria having a spirally twisted rodlike form
- One is a wriggly spirillum, the other a cigar-shaped bacillus.
- That is a spirillum that lives in the blood of rats and mice.
- Both the fusiform bacillus and Vincent's spirillum (perhaps they are the same) are anaerobic (cannot live in oxygen).