- any of a genus (Spirillum) of bacteria having the form of a spiral thread and characterized by flagella
- any of various similar microorganisms
Origin of spirillumModL, diminutive of Classical Latin spira: see spire
- Any of several aerobic bacteria of the genus Spirillum, having an elongated spiral form and bearing tufts of flagellae.
- Any of various other spiral-shaped bacteria, especially one formerly classified in this genus.
Origin of spirillumNew Latin Spīrillum genus name diminutive of Latin spīra coil ; see spire 2.